26708. (a) (1) No person shall drive any motor vehicle with any object or material placed, displayed, installed, affixed, or applied upon the windshield or side or rear windows.
(2) No person shall drive any motor vehicle with any object or material placed, displayed, installed, affixed, or applied in or upon the vehicle which obstructs or reduces the driver's clear view through the windshield or side windows.
http://www.dmv.ca.gov/pubs/vctop/d12/vc26708.htm
Suction cup mounting of GPS and radar detectors are illegal in CA! Effectively making it more difficults to legally install a radar detector. I guess a visor or hidden install are the only legal choices.
(2) No person shall drive any motor vehicle with any object or material placed, displayed, installed, affixed, or applied in or upon the vehicle which obstructs or reduces the driver's clear view through the windshield or side windows.
http://www.dmv.ca.gov/pubs/vctop/d12/vc26708.htm
Suction cup mounting of GPS and radar detectors are illegal in CA! Effectively making it more difficults to legally install a radar detector. I guess a visor or hidden install are the only legal choices.