3. San Francisco
Some studies have tied the Bay Area's traffic jam rates with those of Los Angeles, but Inrix places San Francisco at No. 3 with drivers spending an average of 56 hours in traffic in 2013. That's an increase of seven hours from 2012. Unlike other cities, though, traffic in San Francisco is often worse on the weekends than the work week. Getting in and out of the city almost always requires using a bridge or tunnel, or getting through some sort of toll collection, that inevitably slows down traffic flow.
Worst Corridor: CA-4 WB between Lone Tree Way/A St and Somersville Road
Worst Hour: Thursdays at 7 a.m.
Travel Tip: If you can drive to a BART station and commute from there, do so. If you don't, adjust your travel times to avoid the surge.