[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 HAM'S STATION TO SILVERLAKE CHAINS OR SNOW TIRES ARE REQUIRED FROM 3.5 MI EAST OF SILVER LAKE (AMADOR CO) TO 1 MI WEST OF WOODFORDS (ALPINE CO)