Traffic & Transit
More 101 Lane Closures Ahead For Richardson Bridge Project
Concrete pouring work next week will require a few evening lane closures in the southbound lanes of U.S. 101.

MILL VALLEY, CA — Construction work continues next week on the Richardson Bridge as Caltrans crews pour new concrete on the bridge deck. The work will require up to two southbound lanes to close on US 101 on Monday and Tuesday, and three lanes to close Wednesday through Friday.
Here's the work schedule:
- July 17 & July 18
- Two southbound lanes closed (5 p.m. - 5 a.m.)
- July 19 - 21
- Three southbound lanes closed (7 p.m. - 5 a.m.)
In addition to the lane closures, the southbound connector ramp from 101 to SR 1 will be closed from 7 p.m. to 7 a.m. on Monday and Tuesday, and the on-ramp to Redwood Highway Frontage Road will be closed from 6 p.m. to 7 a.m.
Find out what's happening in Mill Valleyfor free with the latest updates from Patch.
#TRAFFICALERT: Caltrans will continue work on Richardson Bridge (Marin County) along US-101 southbound in July. Construction for the project will involve the replacement of the existing asphalt concrete bridge deck surface with new concrete on US-101 at Richardson Bay Bridge. pic.twitter.com/MxUsMeCF9s
— Caltrans District 4 (@CaltransD4) July 14, 2023
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