Who doesn’t love sitting in traffic? Especially when there’s no apparent reason for it: no crashes, no tolls, no flaming mattresses. Just a sudden and infuriating slowdown of the cars ahead, causing you to slam on the brakes, spill coffee all over yourself and slow to a glacial crawl, usually when you’re already late for something important — a job interview, for instance. Pure gridlock. And then, when all hope seems lost, the congestion breaks as seemingly spontaneously as it began. And you’re on your way again … for a good 2 minutes before the whole thing repeats itself. Welcome to the world of traffic waves, a phenomenon that’s been exasperating drivers since the first cars started coming off Ford’s assembly line a century ago.