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ALAMEDA COUNTY ― The Oakland-Alameda Access Project (OAAP) will officially kick off in early 2026 and continue through 2029, bringing long-awaited upgrades to: Oakland Chinatown, Jack London District and City of Alameda.
What’s Coming
The project will improve freeway access between I-880, I-980, and the Posey/Webster Tubes, add a new pedestrian and bike pathway in the Webster Tube, and enhance safety at intersections, sidewalks, and bike facilities throughout the project area.
Traffic Impacts Ahead
As construction gets underway, the public can expect delays, detours, and full closures of the Posey/Webster Tubes on select nights and weekends.
Plan ahead, consider public transit, and remember—West Alameda stays OPEN during closures.
Stay Connected & Informed
Public meetings are coming soon!
Sign up for updates to stay informed on project milestones, closures, and events.
Access the official Oakland-Alameda Access Project Toolkit to help your organization and community prepare and share updates:
Welcome to the Oakland Alameda Access Project Toolkit
For questions or outreach support, please contact:
📧 oaapcommunications@dot.ca.gov
Please Share
We encourage you to share this information with your networks, newsletters, and community groups so everyone can stay informed about the Oakland-Alameda Access Project and other important Bay Area improvements.
Thank everyone for your patience and continued interest in this necessary vital infrastructure upgrade, that will improve the travel between Oakland and Alameda.
For more information about the D4 Projects, go to:
Caltrans D4 Current Projects
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