Updated Monday September 15, 2008

Caltrans will close westbound lanes on Highway 12/Jameson Canyon for night work this week. Beginning Monday, September 15 and ending on Tuesday September 16  the closure will extend from the I-80 connector with State Route 12 to a half-mile west of Red Top Road, will last from 9 p.m. to 5 a.m on each night. Eastbound lanes on State Route 12 will remain open during this period, but some delays should be expected due to traffic from construction trucks.The detour for westbound I-80 traffic to Napa is Highway 37.

The closure will enable Caltrans crews continue work on a 1.2 mile long truck climbing lane project to the top of the grade west of Red Top Road. This project will reduce traffic congestion by allowing motorists to pass slower heavily loaded vehicles. Construction began in January, 2008 and is scheduled to be completed by this fall, with projected capital costs of $7 million.

Motorists are advised to expect traffic delays during this operation and encouraged to takealternate routes if necessary. Motorists are also advised that traffic fines are doubled in construction zones.Please “Slow For The Cone Zone.”