A map of traffic congestion by metropolitan area. By Nick McClellan . Find my location. If you thought partisan gridlock was the only thing to worry about in the nation's capital, ...

Congestion — defined as traffic flowing below 35 miles per hour on the city’s freeways — increased from 3.8 percent of the time in 2010 to 5.7 percent in 2015.

A new study by the San Francisco County Transportation Authority found that ride-share companies, or what transportation officials dubbed “Transportation Network Companies” (TNCs) caused 50 ...

The Metropolitan Transportation Commission and Waze announced a data-sharing partnership intended in part to provide drivers with better real-time traffic and road-condition information.

According to Google Maps data for President’s Day, the time it takes to travel between Tahoe and San Francisco doesn’t waver too much, taking 3.5 to 4 hours to make the trip.

Assembly Bill 645 authorized speed cameras in six California cities: San Francisco, San Jose, Oakland, Los Angeles, Long ...