A FasTrak Flex toll tag is similar to a FasTrak Standard toll tag. You can use a FasTrak Flex toll tag anywhere in California where the FasTrak logo is displayed. In the Bay Area, you can use FasTrak Flex on all toll bridges and express lanes and at San Francisco International Airport (SFO) parking garages.
In Southern California, you can use a FasTrak Flex toll tag on toll roads and express lanes. For more information on where to use your FasTrak tag, visit the Toll Locations page.
Note that certain facilities require a properly switched FasTrak Flex toll tag to qualify for discounted travel. If you're using the I-880, I-580, I-680 Contra Costa or SR-237 express lanes and you are a carpool, vanpool, motorcycle or other toll-exempt vehicle, you must have a FasTrak Flex toll tag to receive the discounted toll.
Topic: Toll Tags