The female driver escaped serious injury and climbed out of the cab shortly before 10:30 a.m. as police and firefighters arrived, Police Chief Kenneth Ehrenberg said.
All Points Towing in Hackensack had the rig righted by noon.
The LORCO Petroleum Services truck out of Elizabeth was carrying used motor oil, requiring a cleanup. The Paramus hazardous materials unit responded, followed by its Bergen County colleagues.
Backups quickly began forming after the ramp was closed.
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