[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 DEW DROP TO SILVER LAKE (AMADOR CO) CHAINS ARE REQUIRED ON ALL VEHICLES EXCEPT 4-WHEEL-DRIVE VEHICLES WITH SNOW TIRES ON ALL 4 WHEELS FROM PICKETT'S JCT TO 1 MI WEST OF WOODFORDS (ALPINE CO)