How to Use the SR 237 Express Lanes

Getting Started with FasTrak


There are two types of FasTrak® transponders, both are free. Order yours from Bay Area FasTrak®.

The new "FasTrak Flex® " transponder has a switch that the driver can use to indicate the number of people in the vehicle. Drivers should set their FasTrak Flex® switch position before driving.


Visit the FasTrak® website to create and set up your FasTrak® account.


The best place to mount your transponder is on the windshield near the rear-view mirror. You can also mount it in the lower corners of the windshield.


Drive through toll lanes and pay the toll automatically through the FasTrak® transponder.


An Express Lane is a portion of a High Occupancy Vehicle (HOV) lane, also known as a carpool or diamond lane, that has been converted to a toll lane in order to better manage congestion. VTA monitors its Express Lanes to maintain a minimum speed of 45 mph, based on federal requirement.

Express lanes are marked by large overhead signage, and smaller signs located in the median. The toll amount is posted on a changeable board within the large overhead sign.

VTA currently operates Express Lanes on State Route 237. Learn more about the planning and history of VTA's Silicon Valley Express Lanes Program and the 237 Express Lanes project page.

SR 237 Express Lanes Tolls and Hours

The toll on VTA's State Route 237 Express Lanes varies dynamically based on congestion.

Minimum Maximum
$0.30 $8.00

The 237 Silicon Valley Express Lanes operate on the following schedule Monday through Friday:

  Morning Evening
Westbound (toward Sunnyvale) 5 AM to 10 AM 3 PM to 7 PM
Eastbound (toward Milpitas) 5 AM to 9 AM 3 PM to 7 PM

Outside of these hours, the Express Lanes are open to all traffic for free.

Express Lanes Customer Service

Please contact the FasTrak Customer Service Center for information including any toll disputes or questions about charges on your FasTrak® account.

(877) 229-8655 
From outside California: (415) 486-8655

During normal Express Lane operations, solo drivers can use the Express Lanes with a FasTrak® transponder. Solo drivers will be charged the posted toll amount, which varies dynamically based on the level of congestion. The minimum toll amount is $0.30, and the maximum is $8.00.

When traffic is heavy on the 237-880 interchange, the Express Lanes can go into "HOV ONLY mode". This means the lane is no longer open to solo drivers paying the toll with FasTrak®​.

During HOV ONLY mode, only vehicles with 2 or more passengers, motorcycles, and clean air vehicles with appropriate decals can use the Express Lanes. When "HOV ONLY" is posted on the toll message sign, a solo driver who enters the Express Lane can be issued an HOV lane violation citation of $491.

Solo drivers who enter the HOV/carpool/diamond lane too early, or fail to exit the Express Lanes promptly, risk being cited for a carpool violation by the California Highway Patrol (CHP).

Place your traditional FasTrak​ transponder in the Mylar bag if you:

  • Have 2 or more people in your vehicle
  • Have a clean air vehicle with the proper decal
  • Are a motorcyclist

Without the Mylar bag, your FasTrak account will be charged.

With a FasTrak Flex transponder, drivers move a switch to indicate how many occupants are in their vehicle.

If you have an incorrect charge on your FasTrak account, please call the FasTrak Customer Service Center to dispute the charge on your FasTrak® account: 877-229-8655 [Outside of California call: (415) 486-8655].

Express Lanes Privacy Policy

VTA is committed to ensuring customer privacy and security. Read the VTA Express Lanes Privacy Policy.