Officials say the tractor is leaking fuel so the road will remain closed until the crash is cleared.
A DUI charge against the truck driver in last month's deadly pileup crash has been dropped after toxicology results came back negative for drugs or alcohol.
I-78 eastbound in Lower Saucon Twp. was closed overnight after a crash involving two trucks. It has since reopened.
Jashanpreet Singh was charged with gross vehicular manslaughter while intoxicated and driving under the influence of a drug causing injury in the chain-reaction crash.
Chopper 6 was over the scene where a car was wedged between the semi and a cement median.
Officials say a Freightliner semi and a Nissan Pathfinder SUV, with four people inside at the time, collided.