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Rude Drivers Reduce Traffic Jams

BuzzSkyline writes "Traffic jams are minimized if a significant fraction of drivers break the rules by doing things like passing on the wrong side or changing lanes too close to an intersection. The insight comes from a cellular automata study published this month in the journal Physical Review E. In effect, people who disregard the rules help to break up the groups that form as rule-followers clump together. The risk of jamming is lower if all people obey the rules than if they all disobey them, according to the analysis, but jamming risk is lowest when about 40 percent of people drive like jerks."

12 of 882 comments (clear)

  1. and yet NYC still has traffic jams by alen · · Score: 3, Interesting

    especially on the Belt Parkway where people seem to slow down to 30mph to go over a bridge

    1. Re:and yet NYC still has traffic jams by xaxa · · Score: 4, Interesting

      Last week I was in France, in a car, on the motorway. I couldn't understand why the traffic was so jammed up, but I sat in traffic on the 3+3 lane road for almost an hour. There was no traffic on the other side.

      Then, as I came up to a bridge I noticed there were people lined up underneath it -- the Tour de France was passing underneath the motorway. Some people were driving past at less than walking pace hoping that the cyclists would pass by at just that time, but they didn't. Once over the bridge, there was no traffic jam at all -- except on the other side of the road, where the jam went on for miles.

    2. Re:and yet NYC still has traffic jams by fredjh · · Score: 5, Interesting

      Interesting post... I do that all the time, too. I use my cruise not just to maintain speed, but because I'm a leadfoot it helps keep me from getting tickets, and I see it all the time. I think some people are just jerks, but many people do it subconsciously... they'll actually slow when someone is behind them (not necessarily tailgating, as I avoid that), and speed up when you change lanes. It's just perception, as we've both come to the same conclusion by the same means.

      Other things that completely screw up traffic (besides the obvious grid-lockers and rubberneckers, even when someone is just changing a tire or getting a ticket):

      1. "hypermilers" who don't understand lights are timed for the speed limit, and if you don't get up to speed in a reasonable amount of time, you're just going to waste all that gas at red lights.

      2. During rush hour, the problem on "surface" streets is that lights can't be long enough to allow everyone to go through during the green light, so those people just sitting there when the light turns green are racking up the number of cars that are going to get stuck for an extra cycle... but the problem, as I see it, is people have largely stopped honking, so they'll just sit behind such an oblivious person and just wait. If people honked, we could get things moving again. It doesn't have to be a nasty lean on the horn, just a toot-toot.

      3. Cops... I like cops, I appreciate cops, I have cops in the family; it's not really the cops, it's the people who drop below the speed limit simply because one is nearby.

      A few other things that affect me daily: we have a number of locations where the right turn goes into a protected lane... so there are "keep moving" signs... nothing so infuriating as the people in front of you coming to a COMPLETE stop at a "keep moving" sign. In the same vein, there are a number of places with RIGHT turn arrows that are green when the cross traffic has the left turn... again, people come to a complete stop, and sometimes don't even continue moving at all, treating it as a right turn on red.

      And lately, the past year or so, I wouldn't necessarily call them "hypermilers" but so many people seem unwilling to even get up to the speed limit, let alone exceed it by a few miles per hour, as if you're going to get a ticket for 48 in a 45... I know the police aren't going to give me a ticket for 5 miles over, and I often get passed by cops when doing so.

      Whew. Nice to rant about it every once in awhile... "cathartic" experience.

      --
      Stupid, sexy Flanders.
    3. Re:and yet NYC still has traffic jams by causality · · Score: 3, Interesting

      Okay, none of these people are allowed to drive any car with an automatic transmission, ever again. They can drive when they can think.

      Hah! I have also wondered if that alone would change much of this.

      When I was a teenager and had a learner's permit I had a choice of whether I would start out with a manual or an automatic transmission as my parents had each. I chose the manual. I have never regretted that. The extra involvement with what the vehicle is doing helped to give me a better awareness of what's going on around me, because to operate a manual transmission smoothly you can't just react, you have to anticipate what the traffic around and in front of you is doing. That is, it's best to see ahead of time that traffic is slowing down or speeding up so you can already be in the right gear when it does. Learning to use a manual skillfully also implied extra time practicing, giving more opportunities for my parents to notice and correct what would otherwise have become bad habits. Not to mention that if you are familiar with a manual then you can drive nearly any vehicle (at least, any vehicle a normal license would allow you to drive).

      I wish I could prove it but I am convinced that if automatics were outlawed there would be a strong reduction in the number of accidents.

      --
      It is a miracle that curiosity survives formal education. - Einstein
    4. Re:and yet NYC still has traffic jams by amicusNYCL · · Score: 3, Interesting

      Like the guy a few posts up said, the people who irritate me the most are the people who sit in the fast and go the same speed as everyone in the other lanes. We've got a 4/5-lane highway with a speed limit of 65 running through town.

      Going home from work I'll see quite a bit of traffic in the right two lanes, a little less in the third lane, and hardly any in the left lane. Except the one jackass who's going the same speed as everyone in the other lanes and just wants his (her?) own lane. I have no problem running up on those people and sitting on their bumper until they get a clue.

      If you're going the same speed as people in the lane next to you, get in the lane next to you.

      The cop-drivers like you said are always good for a laugh. On the same 65mph highway I'll come up on a clump of cars and, sure enough, there's a cop leading the pack. These people might be going 5 or 10 mph below the speed limit, but no one wants to pass the cop. Assuming there's a lane open I always enjoy passing the clot at 10mph over everyone else and leaving them wondering why the cop isn't pulling me over.

      I saw this once in my rearview, a cop pulled on the onramp and everyone behind him slowed to match his speed (which was lower than the limit). I was the last car in front of him and for the next several miles until we were out of view I just watched the headlights in the mirror get farther and farther back, not a single person passed him. There was a miles-wide gap between myself and the cars in front of me, and the cop.

      Yeah, we should have a daily traffic thread to get this out.

      --
      "Our two-party system is like a bowl of shit looking at itself in a mirror." - Lewis Black
  2. Unrealistic model of academic interest. by pawsa · · Score: 3, Interesting

    As somebody has already mentioned in the comment on PhysicsCentral, a realistic model should take into account the dependence between the probability of causing an accident resulting in a traffic jam and the driving style. I could read only the abstract. If the parameter q is the only parameter used, it is not entirely surprising that they got the results they got. In such a model, the rule-obeying drivers driving in the same direction stick together. Rule non-obedience makes the fluid more compressible. Shock waves in compressible fluids appears at higher velocities. It is surely nice their model agrees with the intuition. I would not call such a simplified model realistic, though.

  3. I hate people by Em+Emalb · · Score: 5, Interesting

    The other day, a person was changing their tire on the shoulder of the road facing the opposite direction (was a 4-lane road, 2 lanes in each direction, separated by a 20 foot or so median) and traffic on my side of the road came to a halt. Once I made it to the front of the line of traffic, in the lane (going the opposite direction) nearest the tire-changer, a car in the lane next to me and slightly ahead of me was gawking at the scene so hard they started drifting HARD into my lane. They were completely mesmerized by someone changing a frigging tire. To the point that they weren't even conscious that they were still driving a car.

    I swear I don't get it. I had to blare my horn at them to get them to get back over into their lane, and they had the temerity to flip me off! Luckily for me, I drive a large truck and was able to pull in front of them at the next light where I stopped, put on my hazards, drug them from their car and threw them into traffic. No, of course I didn't. However, it's interesting how rage-filled we people get in traffic. I am trying to get it under control, but cannot abide selfish, stupid unaware drivers. I hate them with a burning passion.

    --
    Sent from your iPad.
  4. Re:Respect rules of the road, not just the officia by TrevorB · · Score: 5, Interesting

    I know I slow down when people tailgate me very badly (within a meter), and speed up again when they change lanes. It's a guilty pleasure.

    Honestly, it's the only safe thing to me do. If I have someone driving that close behind me I'll need more time to brake if something happens up ahead, to prevent the person behind me ramming into me.

    Give me space, and we'll go a nice fast speed. I'll be happy to let you pass me and will move to the right. Ride my ass and expect to go under the limit.

  5. Re:Respect rules of the road, not just the officia by RobBebop · · Score: 3, Interesting

    the safe thing to do is you should have already switched lanes (if you're in the left that is) by the time they got to you if you see them coming up.

    This isn't always possible. Often, there are people in the right hand lane going 70-75 mph and passing the speed limiters in the left lane who are traveling 65 mph. Just because you want to go 85 mph doesn't mean the slower motorists should automatically bow to your speedy abilities. This would, in my opinion, mean that *you* are driving like an asshole.

    This is *most* evident when two tractor trailers are passing each other on a major two or three lane highway. But basic congestion causes it too... and whenever you drive like an asshole when there is already congestion... you are only going to make it worse.

    Corollary: I've always thought cops should actively seek to give tickets to motorists who get passed on the left by drivers who are traveling at a legal speed limit. That behavior is just a dangerous as the asshole who weaves in and out of traffic. So, slow drivers in right-hand and middle lanes are assholes, too.

    --
    Support the 30 Hour Work Week!!!
  6. Re:Doing their part to reduce traffic! by SnapShot · · Score: 3, Interesting

    I've always wanted a law that billed people who cause accidents on major freeways (or their estates, as the case may be) the average hourly wage for that state multiplied by the number of total hours lost due to their actions. For example, if some asshole gets into a fender bender on 95 because he was fucking with his goddammed cell phone and 10,000 people are delayed for an hour and the average wage in Maryland is $17/hour then he (or his estate) owes $170,000 which can then be used to fund hypertension treatment facilities and meditation centers in the state.

    --
    Waltz, nymph, for quick jigs vex Bud.
  7. Re:Doing their part to reduce traffic! by Skuld-Chan · · Score: 4, Interesting

    I think the jury is still out on whether its safe or not - and most evidence so far suggests its actually safer. I know if traffic is crawling along it seems safe enough to me - the biggest problem is being cut off by arse holes who are pissed off you're filtering through traffic despite the fact they are sitting there.

    http://en.wikipedia.org/wiki/Lane_splitting#Relevant_research

    I know in the UK you can only do it when traffic is flowing below a certain speed, and that they ask you questions about it if you are getting a regular drivers license (yes - hard to believe they'd want drivers of cars to be aware of motorcycles) - of course license requirements there are much much more stringent than they are in the USA.

    Thing is - on a hot day sitting on a hot bike in full gear (its like wearing your fur coat to the beach...) not moving can be really miserable. It can contribute to fatigue, bike failure - all kinds of stuff that I would figure would be more dangerous to traffic than filtering.

  8. Red light: foot OFF the gas by Scrameustache · · Score: 3, Interesting

    1. "hypermilers" who don't understand lights are timed for the speed limit, and if you don't get up to speed in a reasonable amount of time, you're just going to waste all that gas at red lights.

    2. During rush hour, the problem on "surface" streets is that lights can't be long enough to allow everyone to go through during the green light, so those people just sitting there when the light turns green are racking up the number of cars that are going to get stuck for an extra cycle... but the problem, as I see it, is people have largely stopped honking, so they'll just sit behind such an oblivious person and just wait. If people honked, we could get things moving again. It doesn't have to be a nasty lean on the horn, just a toot-toot.

    And lately, the past year or so, I wouldn't necessarily call them "hypermilers" but so many people seem unwilling to even get up to the speed limit, let alone exceed it by a few miles per hour, as if you're going to get a ticket for 48 in a 45... I know the police aren't going to give me a ticket for 5 miles over, and I often get passed by cops when doing so.

    He's a thing I do: When the light in front of me turns red, I get my foot off the gas, and I let the car decelerate towards the red light.
    When I'm in the zone, I pretty much don't stop at red lights because they have the time to turn back to green before I get to them.

    Now, here's the problem with that: The masses of idiots who are in a fucking hurry to go park on the red. They cut me off, and then I have to stop behind them while I wait for them to start up again when the light turns green. Some of them are salvageable, as after seeing me do my thing for a few lights they understand the principle and start laying off the gas when they see the next red, some are not, and insist on cutting me off and, I dunno... win the street race going on in their demented little heads. First one wasting gas and brake lining wins! Woo!

    Anyway, leadfoot, remember that red lights mean "stop accelerating", not "this is the finish line to the race, quick, get here before anybody else" :)

    --

    You can't take the sky from me...