Comment Re:"Sends message" .... (Score 1) 253
Most states have laws about how far over or under you need to be in order to be pulled over, not to avoid pretextual stops, but because the speedometers on most cars aren't accurate down to 1 mph. I know that my corolla, stock, has a 4 mph difference between the ECU and the dashboard, and it is a further 2 mph off from my GPS, on average, over hundreds of miles of driving (granted the GPS isn't all that accurate).