FAIRFIELD — A Rockland man remained hospitalized Thursday in critical but stable condition after his SUV rolled over Wednesday night on Interstate 95 in Fairfield, officials said.

Police said they believe speed and “suspected impairment” were factors in the one-vehicle crash, which remained under investigation Thursday.

Derrick Plowden, 25, was extricated from the 2013 Jeep Grand Cherokee he was driving before he was taken to a hospital, according to Shannon Moss, public information officer for the Maine Department of Public Safety.

As of Thursday afternoon, Plowden remained at Maine Medical Center in Portland, Moss wrote in a statement to the news media.

State troopers arrived just before 9:30 p.m. Wednesday and found Plowden’s SUV on its roof in the median, Moss said. The crash happened at mile marker 131.5 on the north side of Interstate 95 in Fairfield, near the Waterville line.

A passenger, Jimal Gerard, 35, also of Rockland, was able to crawl out of the vehicle, Moss said. Gerard’s injuries were considered minor.

The Maine State Police ask that anyone with information about the crash contact Trooper Randy Hall at 207-624-7076, ext. 9.

The Waterville Fire-Rescue Department, the Maine Department of Transportation and Ace Tire also responded to the rollover.

Other motorists were assisting Plowden and Gerard when emergency workers arrived, Moss said.