[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 3.5 MI EAST OF SILVER LAKE (AMADOR CO) TO 5 MI WEST OF PICKETTS JCT (ALPINE CO) CHAINS OR SNOW TIRES ARE REQUIRED FROM 5 MI WEST OF PICKETTS JCT TO 1 MI WEST OF WOODFORDS (ALPINE CO)