I've set a radar sign up, they always show you slightly faster than you are. 3-5 mph. The city I worked for had one.
HiI think I must rephrase my query.my question was aimed more at the accuracy of the "ODOMETER" the one that calculates distance, rather than the Speedometer.Are the odometers on your C5 calculating the correct distance covered by you, as compared to any other vehicle that you may have used to commute the same distance, such as a car equipped with digital ODOMETER or GPS ??Thanks for a response.