why doesn’t more lanes help mitigate traffic?

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I’ve always heard it said that building more lanes doesn’t help but I still don’t understand why. Obviously 8 wouldn’t help anymore than 7 but 3, 4, or maybe 5 for long eways helps traffic filter though especially with the varying speeds.

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Anonymous 0 Comments

I don’t know if you drive, but have you ever though to yourself ”oh I don’t want to go to my destination by using road X, there is always a traffic jam at this hour, I will use road Y instead. Or maybe ”oh I don’t want to drive downtown it’s always a nightmare, I’ll use the subway instead’. Or maybe ”fuck that I stay home, I don’t want to get stuck in traffic”.

The way we perceive the road affect our driving habits. By opening more road, people that didn’t want or couldn’t use that road suddenly are happy to take it since it doesn’t have any traffic anymore. Word will spread that hey no traffic if you use that road now, which mean more and more people are using it until it reach a new equilibrium. If there is too much traffic, less people will want to use the road which will decrease the traffic. If there is less traffic, more people will want to use that road. It’s the reason why you typically end up with a similar amount of traffic, nobody get stuck 12 hours in traffic because then nobody would use that road. It always tend toward a manageable, but annoying level of traffic because of human behavior.

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