It seems understood that people typically go about 5-10 MPH over the limit. I assume that speed limits are set with the knowledge that this is common. If technology like this becomes widespread and results in the actual speeds more closely matching the posted limits, will the speed limits eventually be increased, since it was always understood that people could safely drive a bit faster than the old posted speeds?
Secondly, I remember hearing that some car companies calibrate their speedometers to be a bit conservative (reporting a higher speed than is actually being driven), in part so they aren't sued by customers who get tickets. If different cars show different speeds, what will this do to the flow of traffic? Will everyone end up going as slow as the most heavily down-calibrated vehicles?
Secondly, I remember hearing that some car companies calibrate their speedometers to be a bit conservative (reporting a higher speed than is actually being driven), in part so they aren't sued by customers who get tickets. If different cars show different speeds, what will this do to the flow of traffic? Will everyone end up going as slow as the most heavily down-calibrated vehicles?