NTSB flags runway-incursion and radar gaps in LaGuardia crash

An NTSB report on the LaGuardia crash says runway warning lights were active as a fire-truck convoy crossed Runway 4 during an emergency response; the air-traffic controller had cleared the crossing, and moments before impact told the fire crew to stop. A firefighter heard a stop warning but couldn’t tell who issued it. The ASDE-X radar failed to clearly distinguish the seven vehicles on the ground, displaying only two targets and none with transponders, highlighting runway-incursion risks and surveillance gaps at major airports.