101 San Mateo Express Lanes


North and southbound on Highway 101 from the Santa Clara/San Mateo County line to the I-380 interchange.


Prices change depending on real-time traffic levels. Prices are higher during peak travel hours and lower when traffic decreases. All vehicles must have a valid FasTrak toll tag to use express lanes during tolling hours.

Solo DriversFull Toll Price
Carpools (2 people)50% Discount
Carpools (3+) and Other Qualified VehiclesFREE
  • Carpools with 3 or more people
  • 2-seater vehicles carrying 2 people
  • Motorcycles
  • Buses/Vanpools
Clean Air Vehicles
(with valid FasTrak CAV toll tag) for solo driver
50% Discount

Hours of Operation

Monday – Friday
5:00 am – 8:00 pm, both directions

Express lanes are free and open to all vehicles outside of these hours.

Method of Payment

  • You must use a FasTrak Flex or FasTrak CAV toll tag to receive discounts.
  • Set the switch to match the number of people in the vehicle (motorcycles and 2-seater vehicles carrying 2 people should use position 3+).
  • Standard toll tags will always be charged the full toll.

Learn more about how FasTrak Flex and FasTrak CAV toll tags work.

NOTE: The 101/SR-85 Santa Clara Express Lanes (operated by VTA) adjoin the 101 San Mateo Express Lanes. You will see separate toll charges when you cross the San Mateo County/Santa Clara County border.

101 San Mateo Express Lanes

Map of the interstate 101 San Mateo Express Lanes. These express lanes run northbound and southbound 6 miles between Whipple Avenue in Redwood City to I-380 in South San Francisco.