[IN THE CENTRAL CALIFORNIA & SIERRA NEVADA] CHAINS ARE REQUIRED ON ALL VEHICLES EXCEPT 4-WHEEL-DRIVE VEHICLES WITH SNOW TIRES ON ALL 4 WHEELS FROM 6.3 MI EAST OF HAM'S STATION (AMADOR CO) TO 5 MI WEST OF PICKETTS JCT (ALPINE CO) IS REOPENED FROM 3.5 MI EAST OF SILVER LAKE TO KIRKWOOD /CARSON SPUR/ (AMADOR CO) AT 0642 HRS ON 3/14/11