A tractor trailer struck the retaining wall on the elevated Park Avenue Viaduct, causing huge chunks of stone debris to fall onto the street below on Tuesday evening, the FDNY said.
Firefighters, police officers, Metro-North workers, and DOT employees all responded to the scene.
Video from SkyFox showed the crumbled stone wall pieces lying on the sidewalk right outside Grand Central Terminal. As the debris fell, it tore down the awning of a store.
The accident blocked traffic on the viaduct, which carries Park Avenue around Grand Central and through the MetLife Building in Midtown Manhattan. The elevated roadway is relatively narrow and features sharp turns.
Trucks are not allowed on the Park Avenue Viaduct.
Cops shut down East 42nd Street between Madison and Lexington Avenue for almost two hours.
Metro-North workers gathered the remaining debris, secured the remaining railing, and determined the viaduct to be structurally sound.
No one was hurt in the collapse, reported Fox 5's Heather Brown, who was at the scene Tuesday evening.