A transit worker was killed yesterday when he accidentally fell in front of a subway train in Queens while on the job, authorities said.

Louis Moore, 58, a signal maintainer and a father of three, fell from a ladder he was using to climb off the tracks at the 46th Street station in Astoria at 3:23 a.m., officials said. His tool bag either caught on a gate or was snagged by the Queens-bound E train. He was declared dead at the scene.