New post on http://twitter.com/caltransdist3 : Current weather conditions on I-80 at Donner Summit. R-2 chain controls: EB Cisco to Truckee, WB Truckee to Eagle Lakes. WB traffic still being turned at Truckee and Donner Lake Interchange due to jack-knifed big rig. http://pic.twitter.com/Nq02VCqjAX - at Donner Pass Summit