As part of the long-term plan to improve traffic flow on I-680, a section of the southbound carpool lane in Alameda and Santa Clara Counties is being converted to an Express Lane, sometimes called a High Occupancy Toll (HOT) lane. Solo drivers with a FasTrak™ transponder will be able to use the lane for a fee that will vary depending on the level of congestion in the Express Lane.

Residents of Pleasanton, Sunol, Fremont, and Milpitas -- as well as commuters beyond the corridor -- will be able to take advantage of the southbound Express Lane by way of several entry and exit points into the lane along the length of the corridor.

Check this website for updates on the project.

The I-680 Express Lane is a project of the Sunol Smart Carpool Lane Joint Powers Agency (JPA). which was authorized by State legislation in 2004. The JPA is responsible for design, implementation and operation of the project. The JPA is comprised of members from Santa Clara County's Valley Transportation Authority, the Alameda County Congestion Management Agency, and the Alameda County Transportation Improvement Agency. The Alameda County Congestion Management Agency serves as administrator of the project.


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