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
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: