How does traffic flow slow down with no obvious reason?

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Ok let me try and make this make sense; when driving on the motorway/highway, why does traffic come to a slow or stop at some points and then speed up (with no obstructions/traffic lights etc) and flow freely with no change in the road or conditions?

If it’s clear up ahead, why do cars slow down or stop when nothing is blocking them in the distance? It’s like it slows down for no reason then just regains speed and traffic flows fine. Drives me insane

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23 Answers

Anonymous 0 Comments

It’s the wave behaviour. Next time you’re driving in slow moving traffic, try leaving 10 car lengths ahead of you. It’s sometimes difficult because the cars in the adjacent lanes will try to cut in front of you. If the car ahead of you stops, take your foot off the accelerator. By the time you get to the car’s position, traffic will start moving, and you won’t have to hit the brake.

That’ll show you what happens when one person gets too close to another, and then brakes. It causes a chain reaction.

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