CAMDEN, N.J., April 17 — Leading up to the accident in which Gov. Jon S. Corzine of New Jersey was critically injured, the state trooper at the wheel of his sport utility vehicle was driving at 91 miles per hour, the superintendent of the state police said this afternoon.

The accident occurred last Thursday as the governor was traveling from Atlantic City to Princeton on the Garden State Parkway for a meeting between Don Imus, the fired radio talk-show host, and the Rutgers University women’s basketball team.

Mr. Corzine was riding in the front passenger seat, the state police said, and was not wearing a seat belt, even though New Jersey state law requires that all passengers riding in the front seat of a vehicle be belted.