Highway 12 through Jameson Canyon in Napa County will be closed at night this week to allow construction crews to do drainage/culvert work as part of widening the road.
The highway will be closed 11 p.m. to 5 a.m. Monday through Friday from Highway 29 and Red Top Road, weather permitting.
Drivers should use Highway 37 instead of 12 to get to and from Interstate 80.
The about $115 million Highway 12 project will widen the road to four lanes from Highway 29 to about I-80. Work is expected to be finished by 2015.
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