Interstate 680 Auxiliary Lanes (Segment 2)

Southwest County
PROJECT BUDGET $35.7 Million
Contra Costa Transportation Authority
Between Sycamore Valley Road and Crown Canyon Road on I-680
This project uses federal, state, local, and Measure C funds. CCTA is completing this project in collaboration with Danville, San Ramon, Caltrans, and the Federal Highway Administration.

The I-680 freeway is a vital transportation corridor serving residents and businesses throughout Contra Costa County. Over the past four decades, traffic volumes have greatly increased along the I-680 corridor, placing substantial demands on the freeway and increasing congestion which affects local residents, businesses and the overall quality of life in Contra Costa County. In response to these increasing demands, the Contra Costa Transportation Authority (CCTA) has planned and implemented improvements along the I-680 corridor over the last decade. A key part of the I-680 corridor improvem ...more