The trailer overturned on the eastbound side of the highway near milepost 4.5 in Knowlton Township shortly after 12:20 p.m., closing three lanes, 511nj.org reports.
The trailer, which was carrying cardboard, was removed from the roadway as of 2:15 p.m.
No injuries were reported.
Click here to follow Daily Voice North Hunterdon and receive free news updates.