New post on http://twitter.com/caltransdist3 : The weekend storm has arrived in the Sierra and I-80 chain controls are up! R-2 EB Kingvale to Donner Lake Interchange, WB Donner Lake Interchange to Rainbow Check http://QuickMap.dot.ca.gov for chain control locations throughout the region. http://pic.twitter.com/JfEN9vdL3A