Connecting Communities

From transporting freight to connecting regional commuters, Contra Costa depends on our hardworking local highways. CCTA is committed to strategically investing in this critical infrastructure, making highways smarter, and increasing capacity to meet growing demand.

Modernizing a Key Regional Link

As 2015 comes to a close, the Highway 4 widening project in East Contra Costa County is about two-thirds of the way complete, with a projected construction end-date of mid-summer 2016. Once finished, Highway 4 will be widened from four-to-eight lanes to help ease congestion and improve travel times. Already, the stretch of freeway for westbound travelers starting just after the Lone Tree Way/A Street undercrossing is open, and these two additional travel lanes have eased congestion for commuters.

Additionally, new connector ramps between Highway 4 and State Route 160 will drastically improve this interchange. Construction will include a soundwall extension, as well as a retaining wall in preparation for a future BART extension, and is expected in early 2016.

The Highway 4 modernization effort also includes project planning and construction on uncompleted segments of Highway 4 in Oakley and Brentwood. This new construction will remove thousands of cars from local streets, which are currently used as a cut-through option when Highway 4 traffic grinds to a halt. The extension of Highway 4 as a modern freeway into East Contra Costa sets the stage for improved connections in the nearby community and beyond.

Innovating Our Way to Congestion Relief

CCTA is committed to ensuring cutting-edge technology will make your commutes safer and more efficient. Two project-one along I-80 and the other along Highway 4-will make better use of innovative technology in the years to come.

The SMART I-80 Corridor Initiative, representing one of the most sophisticated Intelligent Transportation Systems in the state, is implementing a network of integrated electronic signs, ramp meters and other state-of-the-art elements between the Carquinez Bridge and the Bay Bridge on I-80 to enhance safety, improve travel time reliability, and reduce accidents and associated congestion.

The Highway 4 Integrated Corridor Management Planning Grant is being used to study a similarly "smart" set of integrated technology infrastructure to provide drivers with real-time information and improve commute times along a newly modernized Highway 4.

Creating an Efficient Express Lane Network

CCTA is partnering with the Metropolitan Transportation Commission (MTC) on their first Express Lane project in the Bay Area on I-680 from San Ramon to Walnut Creek. The project will convert existing High Occupancy Vehicle Lanes (HOV) to Express Lanes for approximately 12 miles in each direction along I-680. Phase two of the project will add Express Lanes southbound from the Benecia Bridge to the Contra Costa/Alameda County line.

Express Lanes operate like High Occupancy Vehicle (HOV) lanes for carpoolers and buses, but also allow single-occupant vehicles to enter by paying a fee if carpool and bus use is below capacity in the HOV lane.

Construction on the new Express Lanes began in August 2015. When this project is completed in 2020, it will provide a continuous southbound Express Lane on I-680 between the Martinez-Benicia Bridge and the Contra Costa/Alameda County line.