[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 TO SILVER LAKE (AMADOR CO) CHAINS OR SNOW TIRES ARE REQUIRED FROM SILVER LAKE (AMADOR CO) TO 5 MI WEST OF PICKETTS (ALPINE CO)