it is a good idea cause when u sit in your car and see some one zip pass you. they are like 500 feet when u get to type !speed <guy> and plus you have to check and see who is driving and who is in which car. and this could be settled with on thing
If you can't see the drivers name while your on-duty, raise resolution or just LET him go, or try to chase and use /me : Pullover!..
Else, you have to blame yourself if you use !whocar inf, !car playerid, !sus id speeding...
And ofc, that is non-rp what you would do with commands.. I prefer trying to chase down and actually CHECK the guy who drove past you..