Caltrans has permanent CFSs on I-80 over the Sierra to issue winter advisories or closures, but I have not seen them change a speed limit ad hoc. Caltrans does have slower speed limits for chains - 35 mph if I remember correctly. I do not know of any urban winter restrictions in California. Most of our urbs would come to a complete standstill in snow (as happened in the East Bay back in 1973). Dan Smith Principal The Tioga Group, Inc. 288 Rheem Blvd. Moraga, CA 94556 (925) 631-0742 fax (925) 631-7936