Officials said a tractor trailer caught fire Sunday evening at the toll plaza on Interstate 78 westbound in Williams Twp., Northampton County.
It happened just before 8 p.m. Sunday.
Officials said two lanes in the toll plaza are closed due to the fire.
A driver near the scene of the fire said the truck was engulfed in flames, and that fire could be seen in the grassy area near the truck as well.
A Haz-mat crew from Lehigh County was called to the scene because of some material leaking from the tractor trailer, officials said.
There's no word on any injuries.