Posey and Webster Tubes Overnight Closures


District: 4 - Oakland 
Contact: Janis Mara 
Phone: (510) 715-9291
Email: Janis.Mara@dot.ca.gov

Posey and Webster Tubes (State Route 61) Overnight Closures
For Maintenance Work August 2, 2021

ALAMEDA COUNTY — Caltrans has scheduled an overnight closure of the State Route 61 Webster and Posey Tubes August 2, 2021. The Webster and Posey tubes connect the cities of Alameda and Oakland.

The Posey tube will be closed in the northbound direction, between Alameda and Oakland, beginning at 10 p.m. and lasting until 12:30 a.m. The Webster Tube will be closed in the southbound direction, between Oakland and Alameda, from 1 a.m. to 4:30 a.m.

The purpose of the closures is to accommodate maintenance work. Work will be postponed if it rains.

Traffic Control Measures:

Changeable message and directional signs will be in place to assist motorists traveling in the area. The California Highway Patrol (CHP) will be at the sites during the closures.
Vehicles with three or more axles are currently restricted from traveling through the tubes. 
Please drive with caution. Slow for the Cone Zone and Be Work Zone Alert. Caltrans thanks motorists for their patience while we work to maintain our state’s highways, bridges, and tunnels.

For 24/7 traffic updates, follow 511.org: https://twitter.com/511SFBAY. For real-time traffic, click on Caltrans QuickMap: http://quickmap.dot.ca.gov/.