#TravelAlert Caltrans has R2 chain controls on SR-4, SR-88, SR-89, & SR-108 in Amador, Alpine, Calaveras, & Tuolumne Co. See post for more details #KnowBeforeYouGo w. Caltrans QuickMaps app on your mobile device or visit https://t.co/6wFVVXNesz @CaltransHQ @CA_Trans_Agency https://t.co/pcKeSmfu79