Monday, August 31, 2026, through Friday, September 4, 2026
Nightly 7:00 p.m. to 5:00 a.m.
Contra Costa County and Marin County — Caltrans Toll Bridge maintenance crews have scheduled lane closures on both the upper and lower decks to conduct maintenance and repairs. To search for current District 4 lane closure information, please click here.
Lane Closures:
- Westbound (Upper Deck): Lane #2 CLOSED
- Eastbound (Lower Deck): Lane #1& #2, CLOSED
- At least one lane will remain OPEN in both directions
Motorists should expect delays and are advised to seek alternate routes or allow extra travel time.
Traffic Control Measures:
Freeway Changeable Message Signs (CMS) will alert drivers ahead of closures. At least one lane will remain open in each direction during work hours.
Motorists should expect minor delays, reduce speed, and plan extra travel time. Please drive with caution and be prepared for possible merging traffic near work zones. For 24/7 traffic updates, follow 511.org on Twitter. For real-time traffic, visit Caltrans QuickMap.
For more information about D4 Projects, visit: Caltrans D4 Traffic Advisory Publications
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