As far as I could find the courts basically decided that there has to be a way to examine how a result was reached if there was any doubt about it. That the PTB

As far as I could find the courts basically decided that there has to be a way to examine how a result was reached if there was any doubt about it. That the PTB still allowed their use didn't change that and if a case got to court the results could get thrown out. The PTB probably doesn't care because only a small percentage of speeding cases end up in court.