New post on http://twitter.com/caltransdist3 : TrafficAlert I-80 WB & EB chain controls in force from Cisco to Donner Lake Interchange (DLI). Chain controls also Hwy 49 over Yuba Pass Summit. Overnight snow accumulations expected to increase. Be prepared for winter driving conditions and TAKE IT SLOW! http://pic.twitter.com/JqDAsFf3fG