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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."
The problem of cars "clumping" is due to the "rule abiding" drivers following each other too closely. This is in fact not rule abiding.
A reasonable space must be left between each car to provide enough extra slack to handle unexpected events like braking and slowing. When people follow too closely, this slack is all but eliminated thus causing each unexpected event's effect to become magnified. A quick tap of the brakes causes a chain reaction resulting in a traffic jam. Leaving enough space to handle an unexpected event provides each driver extra time to react.
In addition, since the additional slack allows for longer reaction times, a faster average speed can be achieved. Bob Dobbs would be so proud.
No kidding. I have to wonder if they bothered to look at the number of accidents caused when someone did something stupid. TFA doesn't mention accidents at all.
IMO, a lot of problems could be avoided if people respected all the rules of the road, and not just the official ones. For example, I respect anyone's right to drive at whatever speed they feel comfortable with. If that's at, above or below the speed limit I don't care. However, no matter how fast you're going, if there's someone behind you who wishes to go faster, move over to the right. It's not your job to set speed limits, the cops do that, and they exercise discretion too depending on the traffic and time of the day.
What gets me really frustrated is people in the left lane, going at or slightly below the speed limit, with a LONG line behind them. It's situations like these that cause problems, as people who wish to go faster try to get around the slowpokes.
In my opinion, if people simply moved over for a faster car, kept the left lane open for passing/faster traffic, then the vast majority of weaving cars and "jerks" on the highways would disappear.
It's a big peeve of mine. I drive faster than the speed limit, I'll admit it. If I'm in the wrong, the cops will pull me over. However, get out of the left lane if you're going slow and there's 10 cars tailgating behind you!
-"Those who fought today will die tommorow."-
And it depends on which rules, and where. Not all rule-breaking helps, just those that encourage the flow of traffic.
Personally, there's one rule I'd like ingrained in every driver's head: never match speeds with someone in the lane next to you. Pass, fall behind, whatever. Just don't sit there turning a two-lane road into what's effectively a one-lane road.
'Sensible' is a curse word.
Cute. But actually the paper is more about the probability of forming jams, not about getting rid of jams once they've already formed.
The conclusion is more like: Though traffic rules are designed to lead to orderly flows, the lowest jamming rate (under certain conditions) actually occurs when some fraction of participants ignore the rules.
(As a side note, it's a bit of a pet-peeve of mine when people make fun of studies by saying "That conclusion is so obvious! What a waste of time!" Common sense, hunches, and gut feelings are often wrong, which is why we do rigorous research to get at the right answers. And even if the general conclusion is obvious (in hindsight, mind you), rigorous research means that we can say something about error bars and make specific statements about applicability and predictability of models.)
Tell that to all of the A$$holes who suddenly feel the need to accelerate as you try to pass them! Maybe it's just an unconscious competitive thing for some people, but it happens all too frequently. These are definitely not the types of jerks who increase the flow of traffic. I've got my cruise control on, and am steadily approaching the car in front of me at a relative speed of 5-10 mph. I change lanes to pass and all of a sudden the relative rate of speed drops to '0'? Maybe my cruise control just stops working in the center or left lanes?