A runway safety alert didn't notify ATC of a potential collision before the deadly Air Canada crash, the NTSB head said

Source: Business Insider

NTSB investigators found that a safety system designed to alert ATC of impending runway collisions didn't activate before the Air Canada crash. NTSBThe NTSB said the truck that collided with a regional jet in New York didn't have a transponder. She said the lack of equipment prevented a runway warning system called ASDE-X from activating.