Express Lane Completion
This project will address the lack of continuous express lanes within the county, which leads to increased travel time for all users.
A key priority for this project is to smooth traffic throughout the corridor, where delays can reach up to 30 minutes* when traveling from one end of the county to the other.
*Based on INRIX data, Nov 2019
To reduce bottlenecks along the corridor, this project will address weaving issues like those at the Lawrence Way on-ramp and Treat Boulevard off-ramp in Walnut Creek, which regularly cause traffic to back up to the SR-24 interchange.
Estimated construction costs range from $257-$358 million in current dollars. Right-of-way costs will range from $3.5-$5.5 million. These are preliminary estimates that will be adjusted as the project is further defined. This project is eligible for a variety of funding source types, including:
Reduce peak-period congestion and delay
Optimize use of existing HOV lane capacity
Improve travel time reliability
Provide efficient travel options for all vehicles
For more info about this project, contact:
Stephanie Hu – Director, Projects
Contra Costa Transportation Authority
The project team is currently conducting an Environmental Analysis with the following activities:
- Defining feasible Build Alternatives for study
- Performing traffic studies
- Initiating preparation of environmental studies
- Completing environmental field work
- Initiating engineering studies
- Continuing coordination with agency stakeholders including California Highway Patrol, Bay Area Rapid Transit, and local jurisdictions
A wide variety of resource areas are currently being studied as part of the Environmental Studies including:
Public Scoping Meeting Archive
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