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Most (all?) cars have speedometers which already overstate speed of a vehicle. This is I believe because of laws which forbid speedometer to overstate shown spe
by bluecalm 12y ago
Most (all?) cars have speedometers which already overstate speed of a vehicle. This is I believe because of laws which forbid speedometer to overstate shown speed (by some margin) but not understate it so if you are driving 8.5mph above the limit it's probably actually even less than that.