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Cracking the physics of traffic jams

If you sit in a some gridlock this holiday season, you might come to the end of the line of cars and realize, hey, there's nothing there. No accident, no police on the shoulder, just a bunch of cars that aren't getting where they want to go. Over at the Universities of Exeter (in England), Bristol and Budapest, mathematicians now think they've figured out why this happens (and wastes lots of gasoline in the process). The short answer: braking and full roads. When there are between 10 and 15 vehicles on a one-kilometer stretch of highway and ... Read more →

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