I haven't researched it further, but someone mentioned to me once that whilst GPS speed is accurate only on a flat road. An incline will impact the accuracy (something to do with right angled triangles).
My car has 3 spedos. The analogue one on the dash and the LCD / digital display reads the same whilst the GPS one on the larger LCD reads slower, significantly (5 to 7 mph) at times.
I was running errands today and noticed quite a number of speed traps in the area (police with speed guns). Nice, catching folk just before Xmas.
Last edited by: zippy on Sat 18 Dec 21 at 02:51
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