What are the switch positions on a FasTrak Flex and FasTrak Clean Air Vehicle (CAV) toll tag for?
The toll tag switch positions are used to tell the toll system the number of occupants in the vehicle so that the correct toll amount is collected.
The switch positions also assist with California Highway Patrol (CHP) enforcement of express lane use.
Carpools, motorcycles, and other carpool-qualifying vehicles with FasTrak Flex or FasTrak CAV toll tags set to the appropriate setting (1, 2, or 3+) may get discounted or free tolls in Bay Area Express Lanes or carpool lanes (2-seater vehicles carrying two people and motorcycles should set the switch to position 3+). You can find a list of all FasTrak toll locations and their carpool and CAV requirements on our Toll Locations page, or see the tables below.
Remember to set the switch prior to starting your trip.
Express Lanes
Express Lane FasTrak Flex FasTrak CAV
(Clean Air Vehicle)Hours: 5 am-8 pm
Monday – FridaySolo Driver 2 People 3+ People Solo Driver 2 People 3+ People I-580 Full Toll FREE FREE Half-Price Toll FREE FREE SR-237 Full Toll Half-Price Toll FREE Half-Price Toll Half-Price Toll FREE I-680 Sunol Full Toll FREE FREE Half-Price Toll FREE FREE I-680 Contra Costa Full Toll FREE FREE Half-Price Toll FREE FREE I-880 Full Toll Half-Price Toll FREE Half-Price Toll Half-Price Toll FREE 101 San Mateo Full Toll Half-Price Toll FREE Half-Price Toll Half-Price Toll FREE 101/SR-85 Santa Clara Full Toll Half-Price Toll FREE Half-Price Toll Half-Price Toll FREE Bridges
Bridge Commute Hours
(Monday through Friday)Number of People Required Carpool Toll Rate
(with FasTrak)Regular Toll Rate (with FasTrak) Antioch 5:00 am to 10:00 am
3:00 pm to 7:00 pm3+ $3.50 $7 Benica – Martinez 5:00 am to 10:00 am
3:00 pm to 7:00 pm3+ $3.50 $7 Carinquez 5:00 am to 10:00 am
3:00 pm to 7:00 pm3+ $3.50 $7 Dumbarton 5:00 am to 10:00 am
3:00 pm to 7:00 pm2+ $3.50 $7 Golden Gate 5:00 am to 9:00 am
4:00 pm to 6:00 pm3+ $6.75 $8.75 Richmond – San Rafael 5:00 am to 10:00 am
3:00 pm to 7:00 pm3+ $3.50 $7 San Francisco – Oakland Bay 5:00 am to 10:00 am
3:00 pm to 7:00 pm3+ $3.50 $7 San Mateo – Hayward 5:00 am to 10:00 am
3:00 pm to 7:00 pm2+ $3.50 $7
I already have a FasTrak toll tag. Do I need to exchange it for a FasTrak Flex toll tag?
You need a FasTrak Flex toll tag to receive discounts or travel for free on bridges and in Bay Area Express Lanes if you are a carpool, vanpool, motorcycle or other carpool-qualifying vehicle.
Otherwise, your Standard toll tag will work on all express lanes as well as all other FasTrak facilities, but you will pay the full toll price.
Learn how to exchange your Standard toll tag for a FasTrak Flex toll tag in the FasTrak Toll Tag Guide.