[IN THE CENTRAL CALIFORNIA & SIERRA NEVADA] CHAINS OR SNOW TIRES ARE REQUIRED FROM 3.5 MI EAST OF SILVER LAKE TO KIRWOOD (AMADOR CO) 1-WAY CONTROLLED TRAFFIC 9 MI EAST OF PINE GROVE (ALPINE CO) - DUE TO A ROCK SLIDE - MOTORISTS ARE SUBJECT TO DELAYS OF UP TO 20 MINUTES