off ramp | 511 Contra Costa

Southbound I-680 Marina Vista Ramp Closure: May 4 – October, 2015 (Martinez)

On May 4, a closure and detour will go into effect for the southbound I-680 Marina Vista/Waterfront Rd off-ramp in Martinez. The closure will remain in effect until October 2015. Between April and October, a seismic retrofit will be performed on the Mococo Overhead Bridge and the I-680 off-ramp will be replaced.
During the closure, southbound I-680 traffic will detour to the Arthur Road interchange, exit and cross under the freeway, return to northbound I-680, and exit at Marina Vista/Waterfront Road. Marina Vista and Waterfront Road will remain open during the extended ramp closure.
Please allow extra travel time when driving through this area and make sure to Slow for the Cone Zone. For more information about the project, visit the Caltrans Mococo Overhead Bridge Project webpage.
NOTE: Post edited to reflect postponement of closure to Monday, May 4.

On-Off Ramps and Third Bore Night Closures

July 6-8 the far right lane (#4) of westbound Route 24 will be closed. Work crews will begin the closure at 7:30 PM and full closure will take place at 8:30 PM. The closure will take place until 4:00 AM.
During those nights, the Wilder off-ramp will be closed from 9:30 PM until 5:00 AM. The Wilder on-ramp will be closed from 11:30 PM until 5:00 AM. July 6-8 the Fish Ranch Road off-ramp will be closed from 9:00 PM. Until 5:00 AM.
According to, Caltrans crews will be installing electrical conduit as part of the Fourth Bore Project.