The California Department of Transportation (Caltrans) and the Contra Costa Transportation Authority (CCTA) are widening State Route 4 (SR-4) through Pittsburg and Antioch. As part of this construction work, the contractor for the Somersville Road project will be closing all northbound and southbound lanes of Somersville Road where it crosses under SR-4 beginning on November 14, 2011.

This closure will be in place from 10:00 p.m. to 5:00 a.m. on Monday through Thursday nights and from 10:00 p.m. to 6:00 a.m. on Friday night. It is estimated that the work will take a week and a half to complete. The anticipated completion date is November 23, 2011. This closure is to ensure crew and public safety while crews remove temporary supports for construction of one of the new bridges at Somersville Road. Signs will be in place directing motorists around the work zone via Delta Fair Boulevard and Century Boulevard.

Motorists are advised to expect delays and allow extra time for their commute. Please drive with caution through the detour and leave a safe traveling distance between your vehicle and the vehicle ahead of you. Caltrans and CCTA appreciate your patience as we work to improve the highways. For the most current information on all SR-4 corridor projects and lane closures please visit our web site at:

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