Which roads do I need a transponder to drive on?
According to California state law the following roads require a toll tag to travel:
Los Angeles:
I-10 Express lanes
I-110 Express lanes
SR-9 Express lanes
San Diego:
I-15 & SR-125
All other toll roads in California are covered by Uproad. These do not require a toll tag.
Los Angeles/ Orange County:
San Francisco Bay area:
San Francisco Oakland Bay Bridge