Phantom Traffic Jams: What Causes Mysterious Highway Backups?

NPR | Nov. 29, 2013 3:49 p.m.

Contributed By:

Joe Palca

Sometimes highway traffic jams up for no apparent reason. There’s no accident, and no real reason to step on the brakes — except to avoid hitting the car in front of you. What causes these backups? An MIT scientist thinks he’s found a way to prevent these tie-ups.


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