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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Anonymous 0 Comments

It doesn’t slow down for no reason. Somewhere up ahead someone slowed down,hit the brakes a little, or something similar. Thay has the effect of having the cars behind it do the same thing. It doesn’t are long for the entirety of traffic to follow suit and everyone ends up slowing down. I believe it’s covered in traffic flow theory.

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