7. San Jose
Credit: Getty Images

Traffic congestion in San Jose jumped by 25 percent between 2012 and 2013. That's a staggering figure, but it makes sense if you consider the skyrocketing housing prices in San Francisco and the booming tech industry in silicon valley. On average, San Jose drivers spent 35 hours in traffic last year (we'll skip the 'you'd think they'd have an app for that' joke). The Bay Area has added more than 600 miles of highways over the past two decades, but future expansion looks limited to carpool and toll lanes. The BART expansion into the South Bay should be completed in a few years. 

Worst Corridor: US-101 between Lawrence Expy and De la Cruz Blvd.

Worst Hour: Thursdays at 6 p.m.

Travel Tip: It isn't unusual for companies to charter private buses to pick up commuters and bring them to work. Many, like Google, offer several busses a day so that commuters can skip rush hour for faster trips. If your company offers this, hop on.