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Making Quieter Highways

michael posted more than 10 years ago | from the drive-less dept.

Science 137

An anonymous reader writes "Researchers at Purdue are investigating ways to make life for those who live near major highways more quiet. They have found that most of the noise is literally where the rubber hits the road, not engine noise or even passing winds. The team has come up with a new form of pavement that is in testing in Arizona and will soon be installed in California. The pavement is simply asphalt with some mixed in rubber."

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Side effects. (2, Interesting)

Unknown Poltroon (31628) | more than 10 years ago | (#6686994)

How will this affect stopping distance? Probably better. But ill bet it dosent last nearly as long as regular pavement.

Re:Side effects. (2, Informative)

Cy Guy (56083) | more than 10 years ago | (#6687173)

Yeah, the article sites the cost of repaving at "$325,000 per lane mile." whic makes me wonder a couple of things, how long will that last until repaving, what is the per year cost of maintenance (pot-hole repair, re-striping, etc.), and WHY THE HELL DOES THE CONGRESS THINK AMTRAK SHOULDN'T BE SUBSIDIZED?

Sorry about yelling, but seriously, If AMTRAK needs a $3B/year subsidy that is 1500 miles of 6 lane highway - or about the cost to repave I-95 North to south.

Where do you think we are? (3, Insightful)

BoomerSooner (308737) | more than 10 years ago | (#6687567)

Europe?

Seriously though I agree completely with your statement. However, common sense has long since left our government.

Re:Where do you think we are? (0)

Anonymous Coward | more than 10 years ago | (#6690576)

Or, rather, what you call "common sense" isn't so fucking common.

I'm sick hearing people calling their opinion "common sense," as if that will make it more credible.

Coefficient of friction (4, Informative)

n1ywb (555767) | more than 10 years ago | (#6687353)

From http://www.hronline.com/forums/ohs/0109/msg00073.h tml

The coefficient of kinetic friction of rubber on rubber is listed in this

source as Natural rubber, vulcanised at 100m/min on rubber flooring or
rubber tread vulcanisate, clean, - 1.16. That's pretty high!
That IS pretty DAMN high! The coefficient of friction of rubber on dry asphalt is around 0.6 or 0.7, which is already considered to be pretty high. So logically, adding rubber to asphalt would probably improve the coefficient of friction between the tires and the road, hence decreasing stopping distance and improving cornering.

Physics is the study of everything.

Re:Coefficient of friction (1)

FroMan (111520) | more than 10 years ago | (#6687672)

Any ideas about fuel efficiency? It seems to me if the road is causing more friction, there must be more power used to move the vehicle.

Re:Coefficient of friction (1)

ParamonKreel (182921) | more than 10 years ago | (#6687913)

This is stopping friction. Your Tires are Rolling across the pavement when you're driving, and thus not really subject to that. The friction during driving comes from your bearings in the engine, air friction, etc, it's all internal to the car. This increase in stopping friction will really only effect stopping and cornering, to their improvement.

Plenty of friction from tires (1)

AtariAmarok (451306) | more than 10 years ago | (#6688205)

"Your Tires are Rolling across the pavement when you're driving, and thus not really subject to that. The friction during driving comes from your bearings i"

There is plenty of friction involved from the normal tires rolling on the road too. This is what heats up the tires, and causes wear and loss of material over time.

Re:Coefficient of friction (2, Insightful)

n1ywb (555767) | more than 10 years ago | (#6687969)

Not necessarily. One thing that we overlooked was the difference between static and dynamic friction. Static friction tends to be much greater than dynamic friction. When two bodies are stationary against each other, you've got static friction, EG a tire rolling down the road. Dynamic friction is when two bodies slide against each other, EG a tire skidding on the road. So since the friction between the tire and the road is usually static, it shouldn't really effect efficiency much since at the contact patch the tire is actually stationary relative to the road. However we know that the tire flexes and rubs against the road a little bit so more friction could possibly reduce efficiency slightly. Although cars tend to get worse efficiency on dirt roads, so I dunno. Of course with stickier roads, you could conceivably get away with a smaller contact patch by using harder tires, which would really improve efficiency. Harder tires == better mileage, due to lower rolling resistance. So I guess the real question is, how much of the energy lost in a tire is due to the edges of the contact patch rubbing the road, vs. the heat lost by the tire flexing as the patch rotates around it. I'm going to guess that since tires can last 50,000 miles, the effect of the contact patch friction is really negligable, and the flexing of the rubber as it rolls is the greatest source of loss. Hence a stickier road would not decrease efficiency, but you could use harder tires on it and increase your efficiency, although you would lower your friction coefficient somewhat, but it would probably be worth the trade off.

Re:Coefficient of friction (1)

4of12 (97621) | more than 10 years ago | (#6688534)


the contact patch the tire is actually stationary relative to the road.

I wonder if it really is.

Just as you mention, the tire does flex and deform as it comes into contact with the road and as it leaves contact with the road (warm tires after a high speed drive confirm the viscous dissipation during such flexing).

I'd be inclined to believe that smooth roads with very low dynamic friction coefficients would enable better gas mileage because then all expansion and contraction of the contact patch could be accomodated with very little energy loss.

Of course, such roads would be unsafe...

[I remember driving across some steel plates years ago and noticed how road noise decreased a lot. I was quite wary about driving across those plates in the rain, however.]

I'd also be in favor of specially designed acoustic reflectors near roadways to reflect the waves upward and away from residential areas.

Re:Coefficient of friction (1)

aaarrrgggh (9205) | more than 10 years ago | (#6690078)

Rolling friction would be drastically increased, which would improve braking as the parent stated, but would KILL fuel efficiency.

Consider trains: Steel on steel to minimize rolling friction; dump sand on the tracks when you need to stop, and increase the friction. Trains are optimized for operating conditions, not the end conditions.

The upshot however is that you could have the same net friction by reducing the width of the tires. Of course, you could only stop per specs on the special pavement, but that's just a detail...

Re:Coefficient of friction (2, Informative)

Militant Libertarian (696302) | more than 10 years ago | (#6688410)

I live in phoenix, they've done this to a part of the I-17 (near 19th ave).. The road is so nice to drive on, so quiet and the handling on it is prime for going 100 at 3AM (though there's probably 6 or 7 fatal crashes at any given moment, just because the drivers here are totally retarded).

they're doing the SR-51 next, but they're taking their sweet time doing it, at this rate I'll have graduated from ASU before they finish it and make my commute more bareable.

Re:Coefficient of friction (1)

pmz (462998) | more than 10 years ago | (#6688836)

So logically, adding rubber to asphalt would probably improve the coefficient of friction between the tires and the road, hence decreasing stopping distance and improving cornering.

I belive this phenomenon is the reason why new brake pads need a "break in" phase--to embed the pad material into the nooks and crannies of the metal disc surface. The rationale, I suppose, is that pad-on-pad is better than pad-on metal.

Clean rubber (1)

morcheeba (260908) | more than 10 years ago | (#6689838)

That's for clean rubber-on-rubber. Add some dust, sand, or dirt in there, and I'm sure it goes down a whole lot. It's also for generally flat rubber (flooring or tread) - change that for asphalt-like texture and you'll have crannies for the dust to flee to (so it stays out of the contact area), but you'll also change the whole surface interaction.

cool info, thanks.

Elastic Collision? (1)

quinkin (601839) | more than 10 years ago | (#6690848)

The major counter to this argument depends upon the increased elasticity of the "collision" between a portion of tire tread and a portion of the road.

If the elasticity is increased such that a mild rebound effect is produced, this will decrease the effective friction. However, I would not expect this to be a major issue.

In addition, I would expect the initial friction to be of higher importance than kinetic friction for standard (i.e. not emergency braking with wheel lock) driving conditions.

Q.

Allready been done... (2, Interesting)

The J Kid (266953) | more than 10 years ago | (#6688214)

Actually you should be more worried about rain...how it takes to soak into the new asfalt...

Anyway, new tarmack has allready been invented ( to be quiet, yes). It's called ZOAB (Zeer Open Asfalt Beton, which means Realy Open Asfalt Concreet). It's nice airy mix of asfalt & concreet which reduces the time for rain to soak in, making it a lot safer to ride on in heavy rain & is quite a bit quieter..

There are also newer versions that are even quieter, but so far only ZOAB is use on almost all the dutch high-ways.

I wish these people would just combine their efforts instead of staying in that NIH (Not Invented Here) mode.

Re:Allready been done... (0, Flamebait)

pmz (462998) | more than 10 years ago | (#6688866)

I wish these people would just combine their efforts instead of staying in that NIH (Not Invented Here) mode.

Americans can be stubborn. I guess that's why men in South Carolina still have sex with pigs and goats, because new ideas about women came from North Carolina. Please don't ask me where babies come from in South Carolina, because I just don't know...nor do I want to know.

I hope to god they succeed (2, Insightful)

PeteyG (203921) | more than 10 years ago | (#6687100)

I lived next to Interstate number 5 last year, and it was like a constant dull roar coming in through the windows. After living for years in the quiet peace of Alaska, it was quite a shock.

If all the noise is from the rubber hitting the road. We need magnetic cars!

How noisy is construction? (1)

xanderwilson (662093) | more than 10 years ago | (#6687109)

They tear up the roads and lay down new pavement every nine months or so anyway, right? Might as well make it quieter when they aren't working on it.

Alex.

Re:How noisy is construction? (1)

MindStalker (22827) | more than 10 years ago | (#6687141)

9 months, maybe where you live in, most places its closer to 5 years.

It's pretty silent (0)

Anonymous Coward | more than 10 years ago | (#6688140)

It's pretty silent. Typically, someone quickly tears up the roads, covers the landscape with orange barrels, and the "workers" vanish never to be seen again (unless they appear some rare Thursday morning, eating sandwiches and scowling at the traffic going by)

"Orange Barrels, Orange Barrels everywhere i see....Orange Barrels, Orange Barrels staring back at me...Look at Larry, Darryl and Darryl in their orange vest apparel standing next to the orange barrel they pissed off my girlfriend Carol whos sitting next to me...."

Uni Exams = Scrape Road (1)

quinkin (601839) | more than 10 years ago | (#6690870)

I spent four consecutive years in one neighbour hood while attending uni.

Each year I moved house one street further away from the uni, and each year at final exam time they would scrape the top of the road for resurfacing.

It would take a good month for them to do one street, and the noise was truly horrendous.

If a solution is found to this noise then I will be impressed. :)

Q.

They've only just figured this out? (4, Insightful)

gazbo (517111) | more than 10 years ago | (#6687121)

On the A31 near where I used to live there is a stretch that is done in a noticeably darker (and smoother) tarmac. I think it was done specifically for noise reduction, and when driving over it you can really tell - it's a tremendous difference. Like you know if you're in a room with a washing machine and it finishes, and suddenly you're aware of how quiet everything is? Same sort of effect.

Now I'm not saying it's the same stuff, but is it really a new finding that it is the tire/road contact that's noisy when this was done at least 6 years ago?

Re:They've only just figured this out? (2, Interesting)

n1ywb (555767) | more than 10 years ago | (#6687423)

The color of asphalt is pretty interesting. It's always nice and black when they lay it down, because of the tar. But after 8 years or so, a lot of the asphalt they use in Vermont turns to a sort of dusty reddish brown color. It doesn't look so pronounced from the road, but from the top of the mountains looking down it strikes you as odd that it's such a light color. Must be the tar wears away and reveals the color of the gravel used to make it.

Re:They've only just figured this out? (1)

Valdrax (32670) | more than 10 years ago | (#6690463)

Actually, this is dust and dirt being worn into the tar by drivers. You ever notice how it's darker in the middle and lighter where the tires normally go over it? This is why.

Re:They've only just figured this out? (4, Interesting)

jilles (20976) | more than 10 years ago | (#6687477)

Yep, in the Netherlands this kind of thing is long past the testing stage. My country is pretty densely populated and has quite a few highly congested highways. We have standards for sound levels which have to be met. This has created a financial incentive for road constructioners to research solutions to reducing the noise and meeting those standards.

A combination of sound deflecting shields in populated areas and better road surfaces is pretty much standard for roads nowadays here. My parents live about 1km from a very busy highway and while you can hear some noise in the background if it is really quiet (like at night) it can barely be heard.

Re:They've only just figured this out? (2, Funny)

battjt (9342) | more than 10 years ago | (#6687793)

Like you know if you're in a room with a washing machine and it finishes, and suddenly you're aware of how quiet everything is?

Or in a datacenter when the power goes out!

Joe

Re:They've only just figured this out? (2, Funny)

passthecrackpipe (598773) | more than 10 years ago | (#6688039)

Yeah, funny that. I noticed that *always* seems to happen right before everybody starts yelling "Oh Shit!". I keep telling them to stop saying "Oh Shit", so the power will stay up....

Re:They've only just figured this out? (1)

killmenow (184444) | more than 10 years ago | (#6690281)

I have found datacenters can get considerably louder when the power goes out. The servers keep running and then you add all those beeping UPSes...oy!

Now if the power *stays* out...then it gets really quiet.

Re:They've only just figured this out? (1)

Myself (57572) | more than 10 years ago | (#6688502)

Having just completed a 4200-mile roadtrip, I can attest to the dramatic differences in road surfaces. There's a particular stretch of I-70 that drops to, I believe, 35MPH for a few miles. The pavement also changes, and becomes unbelievably noisy. I wonder if the intent was to emphasize your speed, and increase the "reward" for slowing down?

Going from state to state, or county to county, you can tell that different contractors use different mixtures and surface preparations. It's utter bliss to experience the washing machine effect you describe, just as one's favorite song comes on. Why can't they use this stuff everywhere?

I don't believe cost could be an object. Some of the quietest roads of the trip were in the middle of Kansas, miles away from anything. (not even butter and syrup!)

I was at the tire store today, getting a new set of all-seasons to replace the poor old tires that gave their last gasp on the aforementioned roadtrip. The salesdude and I talked tread patterns for a while, about how some tires are simply quieter with no penalty in handling, just snow traction. I never thought I'd regret living in Michigan, but if I could live with non-snow-capable tires, I could get a quieter ride.

I wonder if anyone's ever done a study on stress levels of drivers who're forced to crank their radios to overcome noisy roads and tires. I bet the public health benefit of quieter road surfaces would far outweigh the cost. (Now if only we could get serious about noise pollution tickets for the asshole in the next lane with the kilowatt subs.)

Tires _in_ the roads (3, Interesting)

bill_mcgonigle (4333) | more than 10 years ago | (#6687138)

the pavement is simply asphalt with some mixed in rubber

Disposing of tires by making them into roads has been a dream for recyclers and probably the tire industry, but last I heard they had some major problems [s-t.com] with galvanic reactions from the ground-up radial belts.

Does anybody know if they've solved that problem?

Re:Tires _in_ the roads (2, Informative)

pmz (462998) | more than 10 years ago | (#6687615)

last I heard they had some major problems with galvanic reactions from the ground-up radial belts.

I would imagine that it wouldn't be terribly difficult to build a process that removes ferrous materials from rubber. Melting all the rubber and sticking a big magnet into the goo is one thing that comes to mind. I believe one other metal used in tires is brass, but that shouldn't be as prone to corrosion.

That's tires _under_ the road (1)

morcheeba (260908) | more than 10 years ago | (#6689948)

That link refered to tires used a fill under the roadway:

From this article [uswaternews.com] : ...the recycled rubber is piled to a maximum depth of 27 feet on a 4-foot gravel bed, topped with 3 feet to 5 feet of soil.

What's being proposed is a modification to the asphalt - more of a surface treatment.

A Boon for Union Laden Construction Companies... (1)

SLiK812 (518195) | more than 10 years ago | (#6687156)

This should make construction companies happy, as they find a new reason to tear up streets just to lay down new asphault. Of course, knowing how New York City works, someone will notice 2 mos after the 4 year project is complete (of course over budget), that the 'new' asphault is actually the old asphault... Such is life.

Re:A Boon for Union Laden Construction Companies.. (1)

kippy (416183) | more than 10 years ago | (#6689562)

I live in the Chicagoland area where the two seasons are winter and construction. Our roads are regularly ground down to their component elements and reconstituted in a shoddy manner that necessitates their annual replacement.

I can only assume that this pattern will continue indefinitely rubber in the roads or not. It should be business as usual for the shovel-leaners around here.

liars and thieves (3, Informative)

passthecrackpipe (598773) | more than 10 years ago | (#6687160)

A similar compound was invented in the Netherlands ages ago, using concrete (cheaper and easier to handle then rubber). It is called ZOAB ("Zeer Open Asfalt Beton", meaning "Very Open Asphalt Concrete") This highly porous material has several beneficial properties, such as being more quiet, and more efficient in draining water, thus preventing aquaplaning. It is a safer road, alltogether. Now some university is passing this off as a "Great American Invention"?!?!

Same thing happend with airport groundradar. A Norwegian Company invented a groundradar system for airports, allowing safer manouvering of aircraft in dense fog and other low viz situations. This delivered tremendous safety to airports. The FAA wanted it, but it had to be american - can't buy of those eurotrash companies and all that. 8 years down the line, and it still was not working. In the meantime, you have had about 33 near misses at o'hare alone.......

Obviously I shall now be modded down -50 "unpatriotic eurotrash bastard" whatever.

Re:liars and thieves (0)

Anonymous Coward | more than 10 years ago | (#6687284)

It is called ZOAB ("Zeer Open Asfalt Beton", meaning "Very Open Asphalt Concrete")

Hey cool. Released under the GPL? Where can I find a (heh, heh) tar?

Re:liars and thieves (2, Informative)

passthecrackpipe (598773) | more than 10 years ago | (#6687378)

hehehe, very cool. but in fact, since it is government funded study that invented this in the first place, it is in fact open source. A tar is not available *grin*, but a PDF is. [vbwasfalt.org] . It is in dutch though.....

Re:liars and thieves (0, Flamebait)

FroMan (111520) | more than 10 years ago | (#6687784)

A similar compound was invented in the Netherlands ages ago, using concrete (cheaper and easier to handle then rubber). It is called ZOAB ("Zeer Open Asfalt Beton", meaning "Very Open Asphalt Concrete") This highly porous material has several beneficial properties, such as being more quiet, and more efficient in draining water, thus preventing aquaplaning. It is a safer road, alltogether. Now some university is passing this off as a "Great American Invention"?!?!

Hmmm, yes -1 eurotrash.

You see you they are using asphalt, not concrete. They are using a different method. But, in your blind anti-Americanism you have to speak up and say that you have found offense where none was intended or given.

Re:liars and thieves (4, Insightful)

passthecrackpipe (598773) | more than 10 years ago | (#6688011)

If you would have looked at the content of my post, you would have seen that it concerns a mixture of asphalt as well as concrete. ZOAB technology is now about 15 years old in backwards Europe, so we have gone ahead and recently invented a 2 layer mixture, where the top layer has a higher density then the bottom layer. this greatly reduces sound pollution, and has a much lower requirement for maintenance. It is also more environmentally friendly. To top it off, pun intended, there is a topcoat of a mixture of different polymers that act as a filter, letting water through, but at the same time keeping freezing temperatures out, doing away with the "black ice" phenomena - you know, a thin sheet of ice that is invisible, until you see the big pile-up ahead of you? It also reduces sound pollution more, but is more expensive.

I checked with a mate of mine that actually works on this stuff, and latest I heard, some USians are coming to see how it is done. We stopped playing with rubber about 25 years ago. Soon, you will learn that GSM makes for better cell networks, PAL is the better display standard, Open source is the way to go for software development and deployment (Europe leads the way in terms of OSS deployment, in terms of percentage as well as hard numbers.) and various other "Mysterious Happenings From The Future"

Blind anti-americanism, just because I think the US is silly for not adopting existing, tried and tested technologies - from their allies, of all things - rather then re-inventing the wheel? A troll, I say. Anyway, next time you need a "coalition partner" to give your oil-grabbing excercise a veneer of legitimacy, it will probably be an EU country you will be turning to. Eurotrash Indeed....

Re:liars and thieves (0)

Anonymous Coward | more than 10 years ago | (#6688333)

I don't see what the big fuckin deal is...but first you called the American scientists thieves for stealing EUian ideas and then you call them silly for reinventing the wheel. Make up your mind.

Regardless, I'm sure if they're educated researchers then they're able to do research. And in doing this research, one can assume they checked out what other researchers have tried...it's fairly common in academia to read papers on the topic you're researching. If you actually read the article you would have realized that no one is claiming to be discovering anything revolutionary...they simply played around with tires and pavement.

Re:liars and thieves (0)

Anonymous Coward | more than 10 years ago | (#6690677)

Soon, you will learn that GSM makes for better cell networks,

You gotta be kidding! GSM is a big frequency hog - CDMA is a MUCH better technology. CDMA gives much better performance with far, far less radio spectrum used and much less interference.

Now, Europe does have a better cell phone system, and that's due to choosing ONE technology (even though it's an inferior technology) and sticking with it instead of allowing for multiple incompatible competing standards as in the US and Canada.

But since we're talking about cell phones, why can I call my friend in London on his cell phone and talk for 7 cents a minute, when his mother, in London, pays more than 4 times that to call him just across town? My call has to cross the Atlantic Ocean, and it's still cheaper...

Re:liars and thieves (1)

oni (41625) | more than 10 years ago | (#6688427)

liars and thieves

That's a pretty strong statement. But you can't support it with facts.

A similar compound was invented in the Netherlands ages ago,

That's nice. How does the compound developed in the Netherlands differ from the one developed at Perdue? If you don't know, I humbly suggest you put your flamethrower away. For all you know, Perdue's compound is better, cheaper, or works in a wider range of environmental conditions. At any rate, none of this constitutes lying or stealing.

Now some university is passing this off as a "Great American Invention"?!?!

Nowhere in the story is it referred to as a great American invention. Nonetheless, as I indicated above, it may in fact be a great American invention. It is entirely possible that the Perdue researchers set out to solve the same problem that researchers in the Netherlands set out to solve, and in fact arrived at a unique solution. All without stealing and without lying.

Can we just get to the heart of the matter: why are you so full of hatred that you fly off the handle and start flaming people after such an innocent article??

Re:liars and thieves (1)

passthecrackpipe (598773) | more than 10 years ago | (#6688707)

I'm not flaming, not at all. And yes, you are right. "Liars and Thieves" is a strong statement I cannot directly support. However, if you read the article, specifically the bit at the bottom (in the yellow block) then you would note that the bit at the bottom states:

"Even though European countries and some U.S. experts have suspected that different pavements can lower ever-increasing highway noise levels, researchers are the closest they've ever been to a viable, and more cost-effective solution. While engineers are still testing how durable quiet pavements really are, the Arizona Department of Transformation has resurfaced highways with rubberized asphalt for $325,000 per lane mile."

Call me paraniod, but it seems to imply "researchers have been breaking their heads over this, both in Europe as well as the US, but they are not yet sure. In US (hence, "Great American Invention") we are already way ahead, and are testing this stuff already. This overlooks the fact that this stuff has been in use in the EU for a long time, we know the strenghts, weaknesses, benefits (for example, top-coated two layer ZOAB will typically reduce sound by around 12db, and will increase the speed at which aquaplaning occurs to an absurdly high amount. Also, risk of frost is significantly reduced. Want to talk about environmental conditions?) and costs, as well as the endurance and maintenance requirements. This isn't an invention, in the EU this is a GOVERNMENT STANDARD. This is like Cal Tech claiming they are researching a new system of counting weight, and they discovered that 100 grams actually make up one kilogram. They are now looking how they can apply this new-found knowledge, and invent a way of reliably and consistently measuring up a Tonne. Hmmm.... what if I take lots of these kilogrammes I just invented......(before you answer, it is the metric system, another one of those EU government standards)

Anyway - I do know how the compounds differ - rubber was looked at very early in the research cycle of the Dutch compound, many years ago, and discarded for a variety of reasons, one rather obvious one being the fact that depositing tons of small rubber pallets in the ground is not very good for the environment. How are you going clean up the road at the end of the life-cycle? Also, cost of construction is high, as well as production cost.

I don't know where you see any "hatred" or "flaming of people" in my post. When you mention "full of hatred, flying off the handle, and flaminig people" I recall the opening scene of Lethal weapon 4 - the mad idiot with flamethrower. I am hardly on par with, as an online equivalent, don't you think? Or is the combination of a .sig that critizises current US behaviour on the world stage combined with a pro-EU post considered by you to construe "full of hatred"?

Re:liars and thieves (1)

oni (41625) | more than 10 years ago | (#6689064)

Call me paraniod, but it seems to imply "researchers have been breaking their heads over this, both in Europe as well as the US, but they are not yet sure. In US (hence, "Great American Invention") we are already way ahead

I don't call you paranoid. But I think that any reasonable reader will see that you are way hypersensitive. In my opinion, the article didn't imply anything negative about any other country. In my opinion, your interpretation of the section you quoted is incorrect.

I don't know where you see any "hatred" or "flaming of people" in my post.

You came right out of the gate accusing Americans of being liars and thieves. That statement justifies my characterization of your post as a flame. You've also implied that the researchers are morons in that they cannot see the advantages of the Norwegian system (assuming there are advantages; I will not be convinced of that based on your obviously biased report). Further, you rhetorically refer to yourself as eurotrash (twice) as if to say that it is a given that an American would be too arrogant to engage you civilly. Yeah, I think that shows a little bit of overt hatred.

Your sig is irrelevant to the context of our discussion, but I'll just mention in passing that the quote you have there is in reference to allowing doctors to smoke in hospitals. Yeah, sorry, we don't allow Iraqi doctors to smoke in our hospitals. I guess that means they are being oppressed. I guess disallowing smoking rises to the same level of oppression as Sadam inflicted on them when he'd drop them into chipper-shredders. Right.

In summary, and to get back on topic, although I don't see any animosity in the article directed at your countrymen, you certainly seem to have a lot of it directed my way. It certainly seems to rise to the level of outright hatred. How much more intelligent you would have seemed if your post had been along the lines of "we have a similar system here in my country, here is a link:" but your uncontrolled anger got the best of you and you flew into a rage.

Too bad for you.

Re:liars and thieves (1)

passthecrackpipe (598773) | more than 10 years ago | (#6689684)

"Your sig is irrelevant to the context of our discussion, but I'll just mention in passing that the quote you have there is in reference to allowing doctors to smoke in hospitals. Yeah, sorry, we don't allow Iraqi doctors to smoke in our hospitals."

We don't allow Iraqi doctors to smoke in *our* hospitals? Yarmuk Central Hospital in Baghdad? That's not your hospital, unless the US now owns Iraq. Guess that makes it clear where you are coming from.... And while we are contextualising my sig [guardian.co.uk] , you may read the whole article, and notice that the officer in question forbids smoking a minute after somebody vomited blood all over the floor, the cleaner comes to mop it up, and then proceeds to mop the beds with the same mop and water, due to lack of cleaning materials. You bring the rules, but fail to bring the tools. How typical of a PHB. If that notion of freedom was no so pathetically tragic, it would be put in a Monthy Python sketch, and people would laugh over it.

How much more intelligent you would have seemed if you would have acknowledged how tragic the article in question was, as opposed to just trying to milk it for a cheap shot. You may brand me an "anti-american eurotrash fool, full of hatred" and all that, but that just goes to show how little you know of me, and is more an attestment of the simplistic polarity of your views. I do not judge character based on a couple of messages on a messageboard (unless it is blatently obvious). People who do that look stupid.

Re:liars and thieves (1)

oni (41625) | more than 10 years ago | (#6690245)

You may brand me an "anti-american eurotrash fool, full of hatred" and all that,

You're definitely full of hatred, and it has obviously colored your perception of the highway-noise article and our discussion of it. I have *not* called you eurotrash or a fool however. You have used those labels several times yourself though and it's interesting to me that you evidently have deluded yourself into believing that I am calling you eurotrash. It's symptomatic in my opinion of a persecution complex. You think I am attacking you - that I am out to get you.

In fact, your strong reaction to the highway-noise article can be explained as another symptom of a persecution complex. You must have believed that by failing to cite Norwegian research, the Perdue researchers were somehow threatening you - that it was some kind of affront to your national identity.

And now that I think about it, you used the phrase "call me paranoid" even though no one, lest of all me, had actually called you paranoid. This just lends further credence to my theory. You really do believe that everyone is out to get you!

I don't think I can trust any conclusion you draw. It will always be based on the idea that you are a victim.

BTW:
That's not your hospital, unless the US now owns Iraq.

As a matter of fact, the US does own Iraq. We conquered it. Remember? Whether you agree or disagree with that doesn't matter because the fact is there's really nothing you can do about it. You are absolutely powerless and your voice means nothing. That must be a terrible blow to your ego, but it's true. Furthermore, I really have to ask myself if you are capable of understanding all of the facts surrounding the war, or if your persecution complex has predisposed you to being anti-war. In other words, given that your opinion doesn't matter and is potentially biased by a preexisting persecution complex, why should I listen to anything you have to say?

Criticizing US behavior (0)

Anonymous Coward | more than 10 years ago | (#6689139)

" Or is the combination of a .sig that critizises current US behaviour on the world stage"

Typically, such criticism is based on a combination of ignorance, and outright hatred.

Re:liars and thieves (1)

gidds (56397) | more than 10 years ago | (#6688685)

it had to be American - can't buy of those eurotrash companies and all that

Well, they are the country that invented the NIH (Not Invented Here) syndrome...

Re:liars and thieves (1)

passthecrackpipe (598773) | more than 10 years ago | (#6688768)

Oh, I see. I thought that was the Teflon Shoulder (tm) they had patented......

Re: liars and thieves (1)

gidds (56397) | more than 10 years ago | (#6689109)

Nah. Teflon would never support that huge chip...

Re:liars and thieves (1)

mgoff (40215) | more than 10 years ago | (#6689862)

Maybe if you got the giant chip off your shoulder you could be a little more objective. Where in the article (did you even read it?) did it have the words "Great American Invention"? (hint: nowhere). Let's be honest: the article is a fluff piece. It gives few details on why tires on existing roads make noise and the research being done at Purdue to solve it (no claim that the reserach was exclusive to Purdue). Are you actually claiming that the Dutch system is noiseless? Great! We can just license it immediately! No need to any more research! Oh wait, it still has some noise? Weather conditions are different in (and within) America? Soils, tire types, weight regulations, speed limits are different too?

If I had mod points, I would not mod you down for being anti-american. I would mod you down for 1) being flamebait (with some interesting info, but the flamebait:good ratio was way too high), and 2) using a quote out of context (in your sig)

Freedom here means we have to enforce our values on them.
-- Capt. Margolis, US Army, Iraq.


The original source of this quote is The Register [guardian.co.uk] :
There seems to be an uneasy truce between the doctors and the Americans. The doctors don't like the way the soldiers sometimes try to interfere, especially stopping them smoking in the wards. (emphasis mine)

"Like it makes any difference," says Dr Sabah, pointing at the bloodstained floor and walls.

But CaptMargolis, who seems a good, well-meaning man, is unrepentant.

"This is freedom and freedom can mean different things, and in this case freedom means we are going to have to enforce our values on them," he remarks without irony.

"The Iraqi doctors who have been to the west want their hospitals to be like ours and we have to change their values to do it."
(emphasis mine)


We get it. You're against the war. Guess what: a lot of Americans were against the war too. But you had to stoop to the use of an out-of-context quote to make your point. Pathetic.

And now I will be modded down for being off topic. But, since you hide your email address, I have no alternative.

In Europe too (0)

Anonymous Coward | more than 10 years ago | (#6687213)

Here in Europe too, they've been testing quiter asphalt (they incorporate some kind or rubber in it). Some asphalts that evacuates the water faster are also tested. (I personaly saw impressive results in heavy rain on setions of the Lausanne-Geneva highway in Switzerland).

But in CA, the first step would be to drop those awfull concrete highway (doo-doom doo-doom...)

duh (2, Informative)

greentree (682982) | more than 10 years ago | (#6687262)

of course it's the rubber hitting the road. here in michigan the road commission made a serious mistake in implementing a "new" type of cement that was supposed to last longer. however, it turned out it didn't last long(er), in fact it did the opposite. and worst of all it had rivets perpendicular to the tires moving over it creating an obnoxious howling noise. i've seen more the one local news coverages on pissed off people living nearby highways that have to put up with terrible noise pollution.

Re:duh (1)

bshensky (110723) | more than 10 years ago | (#6688615)

What stretch are you talking about? I remember MDOT talking about I-375 using an experimental type of cement, and it appears to be holding. More recently, I-275 was "grooved", resulting in a reasonable reduction in noise.

I just wish they'd fix M-14 WB west of Plymouth.

Re:duh (0)

Anonymous Coward | more than 10 years ago | (#6690084)

are you sure it wasn't regrooved? i remember seeing the complaints about i75. i think they had put grooves in a certain direction because they thought it'd improve the life of the cement but instead it created a lot of noise. maybe farmington. i live not far from great lakes crossing near the joslyn and baldwin ramps and i can hear i75 pretty distinctively during rush hour if i stand outside my house. i do remember bad reports of poor cement sometime ago but as to which highway i can't remember.

What about safety? (0)

Anonymous Coward | more than 10 years ago | (#6687329)

Most of the time you hear a car coming before you see it. Could this affect safety on roads?

Rubberized Asphalt (2, Interesting)

Radical Rad (138892) | more than 10 years ago | (#6687341)

I read about rubber chunks in asphalt before. Supposedly it lasts longer because when water gets in the nooks and freezes it would normally bust up the surface but with rubber there it gives so pot holes don't form as easily. Another benefit is that using these types of asphalt gives us something to do with old tires that normally sit in a landfill somewhere collecting stagnant water and giving mosquitoes a place to breed. If we can lay a mile of this stuff for $325k instead of concrete or cheaper asphalt but save $2M per mile on sound barriers then that seems like a pretty hot ticket.

Re:Rubberized Asphalt (1)

NeMon'ess (160583) | more than 10 years ago | (#6689993)

the sound wall will last for decades, or until the highway gets widened again. how much more or less long will the highway last when paved with asphalt mixed with rubber? repeated repavings is a cost that needs to be considered too.

Re:Rubberized Asphalt (2, Informative)

Radical Rad (138892) | more than 10 years ago | (#6690076)

A valid point. The article I read was many years ago and if I recall correctly it was something like: the rubberized asphalt would cost twice as much but last 5 times as long. This article lamented that there are laws which force the contractors to take the lowest bid which meets the minimum spec so it was not possible to even experiment with the new materials here in the US. Howver it mentioned that the materials were being tried in several places in Europe with good results.

I just saw this on TV (2, Informative)

KurdtX (207196) | more than 10 years ago | (#6687385)

I don't quite remember the night, but I saw it on tv recently, and it kind of got me thinking.

Now I've got a sports car with some noise dampering, but generally I can hear everything. The nice thing is it's shaped really smoothly, so I hardly get any wind noise, so just about all the noise coming in from outside my car is from the road. The thing I notice is that even with current roads (I live in San Diego), the biggest difference is on the ones that are concrete - since they don't buckle like asphalt-covered ones do. Sure, I've noticed that some of them have grooves, which is where I suppose the air is going (and to help with skidding in the rare event of rain) - those ones seem to be the most quiet. But even those get loud if they're not graded right.

Hey, think about it, most of the time a car is fairly quiet, but when you go over a bump, your car is usually louder after you land and reach the minimum point. The other thing I'd say is that maybe it's due to the weight of the vehicles, as there's a huge difference between cars and SUVs/Trucks - and motorcycles are silent except for their engines. So maybe the solution is to stop selling SUVs... yeah, I'll keep dreaming.

Silent motorcycles (3, Funny)

AtariAmarok (451306) | more than 10 years ago | (#6687870)

"and motorcycles are silent except for their engines"

Yes. Just like dead fish has a pleasant odor, except for the smell.

Re:Silent motorcycles (1)

TwistedGreen (80055) | more than 10 years ago | (#6690597)

Yeah, do they make them so damn loud on purpose, or what? I'm sure I'm not alone in thinking that it's incredibly obnoxious.

Re:I just saw this on TV (1)

ParamonKreel (182921) | more than 10 years ago | (#6687983)

Yeah, I noticed that on my new motorcycle. With stock pipes and a windshield I could hear the clutch engage when I stopped, even at highway speeds the noise from the cars around me was much louder than the wind or the bike.

Of course I realized this was a safety hazard (to me) so I put on loud ass pipes so that even the most insulated SUV can tell I'm coming. Loud Pipes Save Lives man.

Re:I just saw this on TV (1)

BigBir3d (454486) | more than 10 years ago | (#6688276)

You must ride a cruiser...

Loud Pipe Piss Off Man Who Is Neighbor. Hope none of your neighbors involved in local/national government policy making.

Re:I just saw this on TV (2, Informative)

Kiaser Zohsay (20134) | more than 10 years ago | (#6688672)

... so I put on loud ass pipes so that even the most insulated SUV can tell I'm coming.

No, they can't hear you coming, but they can hear you leave. Loud pipes are only loud beside and behind you, not in front. "Saftey" is a lame excuse for some macho show-off BS.

In other news... (-1, Redundant)

Anonymous Coward | more than 10 years ago | (#6687417)

Commander Taco to Shutdown Slashdot
By Colin Johnston
Fremont, CA - The maintainer of the popular news website has decided to call it quits. Commander Taco stated that, "I don't want my work to fall into the wrong hands, so I'm taking the whole thing down." The permanent shutdown is set September 1, 2003.

Whoosh! (5, Interesting)

tickticker (549972) | more than 10 years ago | (#6687442)

I live near the sections of highway where they have laid this stuff, and it's like pulling a nail out of your head when you hit it. The constant hum of the road is much more intrusive then you can imagine. It's alot like turning off the range hood fan after it's been on for a couple hours and the hum has invaded your bones. All you hear is the wind around the vehicle.

I look forward to hitting the stuff, and they are supposed to be repaving a 21 mile portion of a highway thats not even 3 years old yet. (The highway system in Phoenix is still pretty new and growing)

I don't need a sig

Re:Whoosh! (1)

BigBir3d (454486) | more than 10 years ago | (#6687639)

Or you could just build the roads like they did up north... Squaw Peak is nice and recessed, with the nifty looking patterned concrete walls that deaden sound. I know that when Tucson redid I-10 they tried to use the same technique wherever possible. Also helps to keep a nice seperation between "surface streets" and the freeway system.

Re:Whoosh! (0)

Anonymous Coward | more than 10 years ago | (#6687678)

I live near the sections of highway where they have laid this stuff, and it's like pulling a nail out of your head when you hit it.

For some reason, I read this as hammering on a nail already in your head... which made me think of Trep[h]anation [trepan.com] , which is supposed to generate a similar feeling of bliss.

No offense, but I need trephanation like I need a hole in my head.

Then I re-read your comment, and realized you were in the real world after all. Sorry!

Pulling a Nail (0)

Anonymous Coward | more than 10 years ago | (#6687914)

it's like pulling a nail out of your head when you hit it

Is that using one of those hammers that pulls the nail at the same time it is driving it in? Or are you using on hammer to drive a nail into your head as the other hammer is just knocking on the noggin?

I still can't figure out what you mean, but whatever it is, I'm sure Tim the Toolman Taylor has experienced it. Maybe you need two hammers at once.

Still recyclable? (4, Insightful)

Xunker (6905) | more than 10 years ago | (#6687570)

One thing the article doesn't touch on is reusability. One thing that the paving industry likes to pride itself on is that asphalt is almost totally recyclable. However, to my understanding, dense rubbers (such as car tires) aren't reuasable in that way, they can't be melted down and reused with reliability. Would the addition of the rubber have a problem with the recasting of the asphalt? With the amount of repaving that happens every year, what sort of effect will this have on the waste output of a repaving operation?

Re:Still recyclable? (1)

SyFryer (173279) | more than 10 years ago | (#6689540)

I think it might be re-usable, I took a look at what the guys in my village were doing when they recovered a road nearby, and asked, as the road had a very crimsony look to it (which faded to light grey). They said that it is some kind of mixer added to recycled materials (the old road i guess).

To me as a layman, it looked a lot like the 'soft' they put on top of kids playground's in school (like a bouncy layer of rubberised tarmac), a covering over an existing base, it is much quieter to both drive over and live nearby to.

Where I live (UK) we would be better of by having bypass or seperate routes for trucks and trailers taking them out of populated routes, their weight is unfriendly.

Here, most (if not all) people have the double glazing, so hardly any noise at all is heard from road outdoors.

Solution: Segway! (0)

Anonymous Coward | more than 10 years ago | (#6687679)

The solution to this is to replace all cars with Segway's. The highways will be a lot quieter, except you will now have the sound of Steve Jobs shitting his pants every time he sees the segway-filled freeway, and the curses of George W Bush as he repeatedly tries to ride one of the things and gets dumped out.

Why is Windows like a Segway? (-1, Offtopic)

Anonymous Coward | more than 10 years ago | (#6687808)

You're going along real slow, and then suddenly you are dumped out for no apparent reason (Blue Screen of Death, or Concrete Square of Headache).

in canada... (3, Informative)

xilmaril (573709) | more than 10 years ago | (#6687776)

I guess it's different in the states, and possibly elsewhere, but in canada (or at least the handful of cities I've lived in), they've been using rubber in pavement on busy streets for years.

Re:in canada... (1)

Bob Vila's Hammer (614758) | more than 10 years ago | (#6688958)

in Canada... (Score:3, Informative)
by xilmaril [slashdot.org] (573709) O [slashdot.org] on 01:40 PM -- Wednesday August 13 2003 (#6687776) [slashdot.org]
(Last Journal: 04:42 AM -- Wednesday August 13 2003 [slashdot.org] )
I guess it's different in the states, and possibly elsewhere, but in Canada (or at least the handful of cities I've lived in), they've been using rubber in pavement on busy streets for years.

Capitalize that 'C' man, show some national pride! :-)

Wait a sec... (1)

Tom7 (102298) | more than 10 years ago | (#6687834)

The pavement is simply asphalt with some mixed in rubber.

Well, then won't there be more rubber touching the road??

Re:Wait a sec... (1)

sporty (27564) | more than 10 years ago | (#6688259)

Technically, the road will be more.. rubbery. The sound is rubber hitting the current mix of asphalt. They are shifting the asphalt a bit towards more rubber to make it less noisy.

The sound of the rubber road (0)

Anonymous Coward | more than 10 years ago | (#6688303)

" Technically, the road will be more.. rubbery. The sound is rubber..."

Boing! Boing! Bo-o-o-ing!! twoomp twamp twamp. Boing! Boing!

Rubber Roads? Nice! (3, Funny)

Hell O'World (88678) | more than 10 years ago | (#6688019)

Its one more step towards mankind's ultimate dream , bouncy world! Car crash? No problem, you're in bouncy world! Airplane fly into a building? Boing! Ha, Ha, Ha, everybody OK!

Parent Post Babelfished (2, Funny)

jafuser (112236) | more than 10 years ago | (#6688896)

Its one more step towards mankind's ultimate dream , bouncy world! Car crash? No problem, you're in bouncy world! Airplane fly into a building? Boing! Ha, Ha, Ha, everybody OK!


I don't know how or why, but the parent post inspired me to babelfish-recycle it through various languages just for fun. I have some karma to burn, so enjoy at my expense =)

Chinese:
It is more step toward humanity's final dream, has the elastic world! Traffic accident? Without the question, you are in have in the elastic world! The airplane flight enters the building? Boing! Ha, Ha, Ha, hello!

French:
Its more stage towards the final dream of humanity, world bouncy! Car accident? No problem, you are in world bouncy! Fly of plane in a building? Boing! Ha, ha, ha, everyone WELL!

German:
Its more step toward for the crucial dream of mankind, bouncy world! Autoabort? A problem, are not you in bouncy the world! Airplane fly into a building? Boing! Hectar, hectar, hectar, each o.k.!

Italian:
Relative a new point towards the last dream of the humanity, world bouncy! Arrest of the automobile? C$r-nessun.problema, you are in world bouncy! Moscow of the airplane in one construction? Boing! It has, it has, it has, everyone GOOD!

Japanese:
Final dream of the mankind, the world where there is an elasticity many steps than the 1 of that! Automobile accident? There is no world where there is a problem and an elasticity! Growing of airplane to building? Boing! It is good everyone of ha, ha and ha!

Korean:
With mankind ultimate dream, it phase 1 of the world which is cheerful compared to! Car crash? Problem, it is an inside the world which is cheerful spreads out,! At building airplane flight range? Boing! The ha, the ha and the ha all it is good!

Portuguese:
Its one more stage for the final dream of the humanity, world bouncy! Electric noise of the car? No problem, you is in the world bouncy! Fly of the airplane in a building? Boing! Ha, Ha, Ha, all ARE WELL!

Spanish:
His a more passage towards the last dream of the humanity, world of bouncy! Collapse of the car? No problem, you are in world of bouncy! Fly of airplane in a building? Boing! It has, it has, it has, all VERY WELL!

-

"The ha, the ha and the ha all it is good!"

ROTFLMAO! Mod to +5 Stat (0)

Anonymous Coward | more than 10 years ago | (#6690717)

NT

Re:Rubber Roads? Nice! (1)

Captain Nitpick (16515) | more than 10 years ago | (#6690059)

Its one more step towards mankind's ultimate dream , bouncy world! Car crash? No problem, you're in bouncy world! Airplane fly into a building? Boing! Ha, Ha, Ha, everybody OK!

It's even funnier if you imagine this being read by the Zombo.com [zombo.com] guy.

Re:Rubber Roads? Nice! (1)

SamSim (630795) | more than 10 years ago | (#6690452)

Remind me: why don't they make cars out of rubber?

Rubber Bumpers? (1)

quinkin (601839) | more than 10 years ago | (#6691021)

Reminds me of the rubber bumper bar debacle.

Engineers looking at the problems of car crashes decided it would be advantageous to have rubber bumpers so that cars don't smash into each other, but instead bounce "harmlessly" off each other.

Unfortunately, this converted the energy that had previously been lost as deformation, noise, etc. into spring recoil energy...

Consider two cars colliding head on, both moving at the modest speed of 10Km/h. Instead of each driver deccelerating from 10Km/h to 0Km/h in the space of say one meter, they will deccelerate from 10kM/h to -10Km/h (assuming a perfectly inelastic collision).

This basically doubled the force applied to the passengers of the cars and dramatically increased passenger injuries...

Funnily enough they stopped making rubber bumpers. :)

Q.

Noisiest highway in the country (2, Interesting)

drivers (45076) | more than 10 years ago | (#6688186)

I'd be willing to bet that the noisiest highway surface in the country is I-5 in Seattle. I'm not talking about the expansion joints (much of the surface is elevated) but the fact that the concrete has been eroded into visible ruts so you are driving on large chunks of rock. It's deafening inside the car. I recently drove 1200 miles and back (each way) on I-90 and found no section as noisy as that in Seattle. Apparently the problem is studded tires during the winter. It's funny how you see all these old people in the giant cars driving around with studded tires in the winter months even though there's no snow here.

Now if they could just fix I-95... (1)

MightyTribble (126109) | more than 10 years ago | (#6688203)

I swear, I-95 / 93 around Boston has the worst drainage and road surface of any major highway I've seen (but no, I've not driven around LA. :). When it rains, the water just mists above the surface rather than draining away, drastically reducing visibility in otherwise OK conditions. Plus, the lack of clear road markings on I-95/rte 128 make it a case of 'spot the lanes', especially at night in bad weather.

Haven't they heard of reflective paint and cat's eyes? I pity non-local drivers exposed to those roads - it's no wonder there are so many accidents there.

Re:Now if they could just fix I-95... (0)

Anonymous Coward | more than 10 years ago | (#6688327)

Same problems on I-95 here in Connecticut, and down in Miami where my sister and her husband live.

I-95 was a study in how to make a major Interstate Highway the wrong way! :-|

Re:Now if they could just fix I-95... (0)

Anonymous Coward | more than 10 years ago | (#6690794)

I swear, I-95 / 93 around Boston has the worst drainage and road surface of any major highway I've seen

And it's even worse when the Big Dig fills up with water. Horrible.

Where's the grip? (1)

Ratso Baggins (516757) | more than 10 years ago | (#6688289)

Rubber + water + rubber = Slip.

Granted, in the dry it will have good grip.

New Expression (0)

Anonymous Coward | more than 10 years ago | (#6688509)

Old:
This is where the rubber meets the road

New:
This is where the rubber meets the.. Oh wait.. Nevermind.

Not the problem, or the solution (1, Insightful)

flikx (191915) | more than 10 years ago | (#6688526)

The real problem is the fact that idiots continue to build and buy homes next to busy highways; airports too. If you don't like the noise, don't live there!

Re:Not the problem, or the solution (1)

mike_mgo (589966) | more than 10 years ago | (#6689248)

That certainly is a problem and I don't have a lot of sympathy for people who expect the state to install noise barriers because they decide to build a home next to a highway.

But part of the problem (especially here in NJ where everything is becoming more congested) is that new highway construction or expanding local roads into larger highways is bringer traffic nearer to more homes. In this case I don't have a problem with putting a little extra expense into reducing the noise.

Fairly obvious if you ride bike (2, Insightful)

sporty (27564) | more than 10 years ago | (#6688598)

I don't mean a motorcycle either. Try riding a mountain bike at some decent speed. Eventually, at the right speed, it hums quite nicely.

I'd liek to see how long that lasts in VT (0)

bigmoosie (574165) | more than 10 years ago | (#6688698)

When it coems to winter time that stuff will get ripped up by the plow trucks & turn the road into a nast mess of pot holes. No way, they tried that stuff that lets water drain faster, it worked during the summer but when teh snow melted from the salt & froze in those cracks & then it got ripped up by the plows ... what a PITA ~ryan

Old News (1, Interesting)

Anonymous Coward | more than 10 years ago | (#6688745)

I've been driving on a Caltrans rubberized asphalt road nose trial section of I-280 (Woodside CA) for about a year now. It's been great for dropping noise levels, but I want to see what the noise level of this section of road is at the end of its life span.

the road's on fire.... (1)

RockClimbingFool (692426) | more than 10 years ago | (#6689289)

Didn't some country have the bright idea to mix rubber with asphalt before as a way to recycle old tires? and didn't a car bursting into flames after an accident literally cause the road to catch fire?

Recycled tires... (1)

fok (449027) | more than 10 years ago | (#6690296)

Here in Rio Grande do Sul, Brazil, the Government is performing tests with this kind of pavement, made with recycled tires. Its only half a mile, and the diference is brutal...

Re:Recycled tires... (0)

Anonymous Coward | more than 10 years ago | (#6690419)

I live in Phoenix where we've had a few HUGE tire yard fires over the years. The rubberized asphault they are testing here is made from those ugly piles of used tires which is a great way to stop them from burning and dumping tons of pollutants into the air. I always look forward to hitting the stretches of highway that have been treated cuz its such an amazing difference. It's similar to the difference between driving with your windows down or up. You think your car is a quiet ride untill you hit the treated area and you realize your radio is suddenly hurting your ears and you reach to turn it down. I love my rubberized highway travels.
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