All lanes have been reopened on the westbound LIE at exit 62 following an earlier accident.
Police tell News 12 the accident happened around noon.
All westbound lanes were shut down, except the HOV, which caused a traffic backup.
A tractor-trailer passed under three other overpasses before hitting one at the exit in Holtsville.
Construction workers were on the overpass, but no one was hurt.
For extended Chopper 12 footage from above the crash scene, watch the clip to the left or click News 12 Extra on Optimum TV channel 612.