New post on http://twitter.com/caltransdist3 : Chain Control Update: I-80 is R2 Cisco Grove to Donner Lake Rd. Trucks are minimum. SR-89 is R1 Sattley to Calpine. R1 Prosser Dam Rd. to Little Truckee Summit. SR-88 is R2 Hamms Station to Red Lake Creek. SR-20 no controls. US-50 no controls.