US safety agency says ASDE-X tracking system did not work at LaGuardia during jet collision

March 24 (Reuters) - The National Transportation Safety Board said on Tuesday that a system which would have allowed a New York airport controller to track movement of airport and vehicles did not alert during a Sunday night collision between an Air Canada AC.TO commercial jet and a truck.

NTSB Chair Jennifer Homendy also told reporters in New York the truck, which was crossing a LaGuardia Airport runway to assist a separate plane, did not have a transponder. Homendy added there were two controllers working.