Re: GPS should only be used when stationary (PM Mailbag Friday, 02 October 2015) – If you position your GPS in the correct place on your dash, it will not obstruct your vision. Mine sits in the bottom right hand corner of my screen, and works perfectly. I also have a GPS speedometer. Sits in “line of sight”, but, it does not interfere with anything. I never have to look at my car’s speedometer.