Overview
Overview
The Interstate 680 (I-680)
Express Lane Completion
project is part of the Contra
Costa Transportation
Authority’s (CCTA) INNOVATE
680 program, which seeks
to implement a suite of six
projects that, when operating
together, will address corridor-wide congestion,
travel delays, and operational challenges. The
Express Lane Completion project proposes to
construct a northbound express lane from Livorna
Road to State Route 242 (SR-242). This project
would also convert the existing northbound High-occupancy vehicle (HOV)
lane that runs from SR-242 to the Benicia-Martinez
Bridge Toll Plaza, to an express lane.The goal of the project is to complete the I-680 express lane network through Contra Costa County to increase travel speeds for those choosing to travel by carpool, vanpool, or motorcycle.CCTA, in partnership with the Metropolitan
Transportation Commission (MTC) and the California
Department of Transportation (Caltrans), has started
preliminary design and environmental analysis
on the Express Lane Completion project to better
understand possible solutions that will improve
operations and mobility on this critical corridor.
project is part of the Contra
Costa Transportation
Authority’s (CCTA) INNOVATE
680 program, which seeks
to implement a suite of six
projects that, when operating
together, will address corridor-wide congestion,
travel delays, and operational challenges. The
Express Lane Completion project proposes to
construct a northbound express lane from Livorna
Road to State Route 242 (SR-242). This project
would also convert the existing northbound High-occupancy vehicle (HOV)
lane that runs from SR-242 to the Benicia-Martinez
Bridge Toll Plaza, to an express lane.The goal of the project is to complete the I-680 express lane network through Contra Costa County to increase travel speeds for those choosing to travel by carpool, vanpool, or motorcycle.CCTA, in partnership with the Metropolitan
Transportation Commission (MTC) and the California
Department of Transportation (Caltrans), has started
preliminary design and environmental analysis
on the Express Lane Completion project to better
understand possible solutions that will improve
operations and mobility on this critical corridor.
Priorities
SYSTEM CONTINUITY 
This project will address the lack of continuous
express lanes within the county, which leads to
increased travel time for all users.CONGESTION RELIEF
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.OPERATIONAL IMPROVEMENTS
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.
Goals
 | REDUCE PEAK-PERIOD CONGESTION AND DELAY |
 | IMPROVE TRAVEL TIME RELIABILITY |
 | OPTIMIZE USE OF EXISTING HOV LANE CAPACITY |
 | PROVIDE EFFICIENT TRAVEL OPTIONS FOR ALL VEHICLES |
Cost
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:- Federal
- State
- Regional
- Local
Planned Milestones
For more info about this project contact:
Stephanie Hu,Acting Director, Projects
Contra Costa Transportation Authority
925.256.4740 StephanieH@ccta.net*Based on INRIX data, Nov 2019
Construction
Our Innovate 680 endeavor is just getting underway. Stay tuned for additional information about this project soon.
Stay Informed
Our Innovate 680 endeavor is just getting underway. Stay tuned for additional information about this project soon.
Quicklinks
Our Innovate 680 endeavor is just getting underway. Stay tuned for additional information about this project soon.