SR 203 [IN THE CENTRAL CALIFORNIA AREA & SIERRA NEVADA] IS CLOSED FROM THE MAMMOTH MOUNTAIN INN (MONO CO) TO THE MONO/MADERA CO LINE - FOR THE WINTER - MOTORISTS ARE ADVISED TO USE AN ALTERNATE ROUTE CHAINS OR SNOW TIRES ARE REQUIRED FROM THE JCT OF US 395 TO THE MAMMOTH MOUNTAIN INN (MONO CO) PLEASE RESEARCH CHAIN CONTROL LOCATIONS AS CALTRANS IS CURRENTLY WORKING TO UPDATE CHAIN CONTROL DESCRIPTIONS FOR CONSISTENCY WITH INTERNET MAPPING, LIKE GOOGLE MAPS & MAPQUEST.