GREENWICH -- A 57-year-old man was killed early Friday while changing a flat tire on a tractor-trailer, State Police said.

The victim was identified as Henry Wagmeister, of Weston. He was the owner of Truck Tire Sales and Service in Norwalk.

The accident, which took place at 2:40 a.m. between exits 2 and 3 of Interstate 95, closed all northbound lanes for more than four hours.

Police said Landy Narcisse-Para, 25, the tractor-trailer driver, was standing at the driver's side front corner of the vehicle while Wagmeister was changing a flat tire at the rear of the vehicle.

According to police, a tractor-trailer then traveled into the right shoulder and struck the rear of the tire service truck, pushing it into Wagmeister.

That vehicle then veered across all three travel lanes and struck the median barrier. State police said the truck that slammed into the vehicle was carrying "several pallets of alcoholic beverages." The impact of the crash threw some of the cargo into the center and right travel lanes, police said. A fuel tank on the truck also ruptured sending diesel fuel into storm drains.

Wagmeister was pronounced dead at the scene by Greenwich EMS personnel.

At 8 a.m., the state Department of Transportation reported that the accident scene had been "cleared," but there were still significant delays in both directions. Northbound backups stretched several miles into Rye, N.Y.

By 10 a.m., all lanes were reopened and traffic was moving through the area.

All northbound lanes were closed for several hours so state police could conduct their investigation into the fatal crash. DOT crash trucks, payloaders, sanders and street sweepers also were used to clear the scene.

Traffic was detoured off exit 2 onto Route 1 and redirected to I-95.

Staff writer Frank Juliano and Digital News Editor Jim Shay contributed to this report.