Posey Tube

Posey Tube Reopened ahead of schedule

The Posey Tube was entirely closed for repairs Monday, March 19, during the day and reopened at midnight, after causing major traffic problems not seen often in the City of Alameda.

The Island came together in a show of support to those values that best represent the Alameda community. 

Starting at 6:30 a.m. Valentine's morning, Alameda Progressives, Solidarity Sundays, Everybody Belongs and the Impeach Trump campaign were all represented in a colorful display of solidarity on this special day symbolizing love.

They were greeted with a wall of non-stop honks and waves of support from Alamedans headed to work through the Posey Tube.  


Caltrans is moving forward with the Oakland-Alameda Access Project. Caltrans says that it aims to improve connections between Interstate 880, Interstate 980 and the Webster and Posey tubes that connect the cities of Alameda and Oakland. Improvements would speed the flow of traffic out of the Posey Tube into Oakland. Once out of the tube, traffic would turn right onto Fifth Street and follow a “horseshoe” loop under I-880 at Jackson Street, easing access to northbound I-880. 


The guardrails in the Posey Tube have been replaced as part of an overall retrofit and maintainence of both tunnels between Alameda and Oakland. Along with guardrails, the sidewalk will be repaired, loose concrete removed and replaced and corrosion cleaned and painted.

This new railing will be very similar in appearance to the original railing, but will have tensioned cables added to meet current safety standards and placed flush with the edge of the sidewalk. Similar improvements are planned for the Webster Tube.


The California Department of Transportation (Caltrans) announced recently that it will close the Posey Tube for maintenance and servicing from Alameda into Oakland on Thursdays through August of this year, from 10 p.m. to 5 a.m. the following morning.

The pedestrian walkway will also be closed seven days a week, 24 hours a day. Baystar Shuttle Service is available for pedestrians traversing the tube by calling 401-4657. Detours will be in place.

Caltrans announced that it will close the Posey Tube for inspection and maintenance from 10 p.m., Wednesday, Feb. 17, to 5 a.m., the following morning. The tube, built in 1928, carries traffic from 
Alameda into Oakland.

Contractors currently working on a second project to rehabilitate the tube will continue with their work as scheduled. This includes repair, not maintenance work, and involves replacing guardrails and sidewalks, repairing and installing lighting and closed-circuit televisions, as well as rehabilitating the tube’s superstructure.