The state police cruiser went off the turnpike on the eastern spur near milemarker 113 just after 8:30 a.m.
The vehicle flipped onto its side, and the trooper had to be extricated by first responders.
The trooper was rushed by helicopter to University Hospital in Newark with non life threatening injuries.
The trooper is based out of Newark.
It did not immediately appear that other vehicles were involved in the crash, which is under investigation.
At least two northbound Turnpike lanes on the eastern spur were closed for the investigation.
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