Why do police cars have certified speedometers, while civilian cars do not?
In: Engineering
because the radar in a cop car can only tell the difference between its self and a target car’s speed, not the actual speed.
If the cop car’s speed is not known with certainty, neither is the target car’s speed.
And you cant write a speeding ticket based on “well they may have been going to fast, that or my speedometer is wrong”
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