[IN THE CENTRAL CALIFORNIA & SIERRA NEVADA] CHAINS OR SNOW TIRES ARE REQUIRED FROM COOK'S STATION TO 4 MI EAST OF HAM'S STATION (AMADOR CO) 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 (AMADOR CO) TO 5 MI WEST OF PICKETTS JCT (ALPINE CO) 1-WAY CONTROLLED TRAFFIC 9 MI EAST OF PINE GROVE (AMADOR CO) - DUE TO A ROCK SLIDE - MOTORISTS ARE SUBJECT TO DELAYS OF UP TO 20 MINUTES