Haverhill chain-reaction crash causes injuries
Have you ever been driving on a freeway in Boston, when the traffic slows considerably, so you think there is an accident up ahead? You crawl along in traffic and then a short time later, the traffic simply picks up and you're moving at normal speeds again. There was no crash. There wasn't anyone changing a tire. The lanes weren't closed for construction. What you just experienced was the chain reaction that builds when people tailgate and must apply their brakes. It is called a traffic wave. The main cure to its occurrence is to leave ample car lengths between…
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