In my humble opinion, we have a duty as citizens to report unsafe drivers in order to prevent traffic accidents. If one knows of an incompetent or chronically impaired driver, there is action that can be taken to report that person and thereby hopefully eventually remove that person from the road, either temporarily or permanently, in order to prevent fatalities and injuries. If we are out driving and observe someone exhibiting unsafe driving behavior, the California Highway Patrol (CHP) wants us to report it while it is happening by calling 911. There is also a procedure for reporting such drivers to the DMV. The DMV has a Form (DS 699) Request For Driver Reexamination, which can be found online, by which ordinary citizens can report to the DMV unsafe drivers known to them. I recently used this form to report an extremely elderly man who I observed for several minutes exhibiting incompetent driving behavior on Highway 101. While I should have notified the CHP immediately, I later used the DS 699 to report the driver using the car plate number and vehicle and driver description.