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I-680 Sunol Express Lanes

The I-680 Sunol Express Lanes are designated lanes that can be used during heavy traffic to bypass congestion. Express lanes are usually located on the far-left side of select major freeway corridors (described below) and are indicated with white descriptive text on the pavement and electronic signage above the roadway.

Effective August 10, 2020, the I-680 Sunol Southbound Express Lane will be restricted to carpool use during the operating hours of 5 am – 8 pm, Monday – Friday, until tolling resumes in fall 2021.


Southbound, a 14-mile stretch from SR-84 to SR-237.


FREE for carpools, motorcycles, eligible clean air vehicles (CAVs) and other toll-exempt vehicles. For all other vehicles, prices adjust dynamically depending on real-time traffic levels.

Hours of Operation

Monday through Friday 5:00 am to 8:00 pm, both directions

Method of Payment

For toll-free travel, carpools, motorcycles and eligible CAVs may use a FasTrak Flex toll tag set to position 2 or position 3+ or a Standard toll tag placed in its Mylar® bag. Solo drivers may use a FasTrak Standard toll tag or a FasTrak Flex toll tag set to position 1. A FasTrak CAV toll tag should be set to the number of people in the vehicle. Learn more about how the FasTrak Flex toll tag works.

ACTC information page

Using Express Lanes

Please use the following tips to avoid common pitfalls when traveling in Bay Area express lanes:

You can only enter and exit express lanes at dashed or broken lines on the roadway or at fixed entry and exit points.

Express Lane Diagram 1

Note: I-680 Express Lanes in Sunol have fixed entry points. Please use roadside signage to guide you when travelling on these lanes. Learn more about using the Sunol express lanes by visiting the Alameda CTC website.

Some highway exits may not be available when driving in an express lane. Check roadside signs for details.

Express Lane Diagram 3

Example: On westbound I-580, you must leave the express lane before Hacienda if you want to exit at Dougherty or to access I-680. On eastbound I-580, do not enter the express lane if you need to exit at Santa Rita or Fallon/El Charro.

Do not cross the double white lines to enter or leave an express lane. Crossing them is a traffic violation.

Express Lane Diagram 2

Helpful hint for solo drivers: Overhead signs will display two toll rates: one for traveling through to the next zone and one to travel through until the end of the express lane. If you exit the express lane at the final posted zone, you will be charged the toll that was displayed when you entered the express lane. If you exit the express lane before the final posted zone, you will be charged a lower price.

Express Zone Pricing