Southbound I-680 Marina Vista Ramp Closure: May 4 – October (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.