[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 4 MI EAST OF HAM'S STATION TO SILVER LAKE (AMADOR CO) 1-WAY CONTROLLED TRAFFIC AT VARIOUS LOCATIONS FROM DEW DROP TO 4 MI EAST OF HAM'S STATION (AMADOR CO) FROM 0800 HRS TO 1500 HRS TUESDAY THRU FRIDAY THRU 1/20/12 - DUE TO MAINTENANCE