The incident happened at 7 a.m. Wednesday in the southbound lanes near the exit for Business Route 1 in Langhorne.
Police tell Action News six vehicles sustained damage following a chain reaction crash.
There were no immediate reports of serious injuries.
All southbound lanes were blocked as crews worked to clean up a fuel spill and clear the wrecked vehicles.
All lanes were back open by 8:30 a.m., but delays persisted.