LEWISTON - The state medical examiner's office plans to investigate the death of a truck driver from Sabattus who crashed his flatbed rig into the median of the Maine Turnpike Thursday near the Sabattus-Lewiston line.

When rescue workers arrived at the scene around 2:50 p.m., Randy Sebring, 36, had died but there was no obvious sign of trauma on his body, said Steve McCausland, spokesman for the Maine Department of Public Safety.

The accident occurred on the Interstate-95 southbound side, about 1 mile south of the Sabattus interchange.

The impact with the highway divider smashed the grill area of the commercial hauler, which came to rest right side up in the median. No other vehicle was involved.

The rig door read "Boston Ladder & Scaffolding Co." and "Auburn, Maine" on the side. Construction scaffolding filled the truck bed.

McCausland said Sebring was heading back to Auburn after a trip to Mount View High School in Thorndike.

Around 3 p.m., shortly after police, rescue crews and firefighters arrived on the scene, southbound traffic on the highway was narrowed to one lane and the backup stretched for nearly a mile. It continued for hours as police experts sought to reconstruct the crash.

The roadway was cleared around 5:30 p.m.