If you have an aftermarket Global Positioning System, California law requires you to attach it to a place that will not obstruct your view of the road.
Mount the device either in a:
- Seven inch square in the lower corner farthest from the driver; or
- Five inch square in the lower corner of the windshield nearest to the driver and outside of an airbag deployment zone.
Learn more about the placement of objects on the windshield at http://www.dmv.ca.gov/portal/pubs/vctop/d12/vc26708.htm?lang=en.