Hi Songbird;
Actually it was PFAST part of CTAS that was stopped. The reason for it was that it was found that it was lacking and to get it to the level of what controllers did it would cost a pretty sum of money. NATCA convinced the FAA that it would be more prudent to spend that money on other projects such as ASDE-X and other things then to spend millions on a system to get it just as good as controllers. Of course the NASA folks had other ideas <G>...
regards
Scott