LEWISTON — A man who was killed Thursday night when his speeding car slammed into the back of a tractor-trailer on the Maine Turnpike was identified Friday by police.

Luis Andrades-Garcia, 35, of Portland was driving a car owned by a friend from Massachusetts. Police said they didn’t know why he was speeding.

Police were first alerted to his erratic driving south of Lewiston. He then shot past a Maine State Police trooper in Auburn, which prompted a chase as that trooper tried to stop Andrades-Garcia.

The car crashed in Lewiston after hitting guardrails in a construction zone and the back of a tractor-trailer. The car flipped and caught on fire in the northbound lane at the end of the Lisbon Street overpass, police said.

Andrades-Garcia didn’t have a driver’s license and had been in prison recently on a drug conviction at the Maine Correctional Center in Windham, police said.

The driver of the truck, Aaron Bolduc, 47, of St. Albans was not injured, police said. He had slowed his truck while driving through the construction area, where the speed limit was 50 mph.