up hill south 101 hwy near Civic Cntr exit approaching San Rafael speed limit changes from 65 to 55 then goes down hill. Many people go well above the limit 75+ at times. It is hard to see speed limit sign because of multiple lanes volume of traffic and changes to road conditions, up hill, down hill, entrance and exit at starting, peak, and bottom of hill, then sharp left turn entrance from San Rafael and exit to 580 at bottom of hill. There has been many accidents there.