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I already have a FasTrak toll tag. Do I also need a FasTrak Flex toll tag?

It depends. You need a FasTrak Flex toll tag if you are a carpool, vanpool, motorcycle or other toll-exempt vehicle that will use the I-880, I-580, I-680 Contra Costa or SR-237 express lanes. Otherwise, your Standard toll tag will work on all express lanes as well as all other FasTrak facilities.

NOTE FOR CLEAN AIR VEHICLES TRAVELING IN I-880, I-680 CONTRA COSTA AND SR-237 EXPRESS LANES
If you are an eligible clean air vehicle (CAV) using the I-880, I-680 Contra Costa or SR-237 express lanes as a single occupant, you must have a FasTrak CAV toll tag to receive the 50% discount. Solo drivers in eligible CAVs using a FasTrak Flex or Standard FasTrak toll tag in the SR-237 express lanes will be charged the full toll.

Topic: Toll Tags