Six vehicles on the trailer caught fire near milepost 13.7 in Frelinghuysen Township just after 5 a.m., NJSP Trooper Alejandro Goez told Daily Voice.
The Allamuchy Fire Dept. provided mutual aid by cutting the hoods from cars that were still smoking and exposing hot spots, the station said.
Seven cars remained unscathed, and the trailer was left in salvageable condition, crews said.
The scene was cleared about an hour later after overhaul and cleanup was complete.
No injuries were reported, and all lanes were reopened by about 10 a.m., Goez said.
“Big thanks to 91 Fire for responding and assisting along with 46 Rescue,” said the Hope Volunteer Fire Dept.
The cause of the fire was not immediately clear.
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