A tractor-trailer struck Interstate 95’s Sasco Creek Road bridge near the Westport-Fairfield border late Friday morning, killing the driver.

The crash, between the highway’s Exits 18 and 19, shut down the right and center northbound lanes back to Exit 17 shortly before noon, while firefighters from Westport and Fairfield extricated the driver from the truck cab.

According to an accident report from State Police 43-year-old Issiaga Toure, of Providence, R.I., was driving a truck in the right-hand northbound lane when, “for an unknown reason,” the truck “drifted off the roadway to the right where it struck and went through a metal beam guardrail.”

The truck then “struck a lamp pole and a metal highway sign before striking the bridge support for the Sasco Creek Road overpass,” according to the report.

Toure was pronounced dead at the scene. Kelly Grant, the State Police spokeswoman, confirmed Friday evening the driver had died, but said troopers had not yet notified the driver’s family of his death.

About 11 gallons of fuel and other fluids poured from the damaged truck onto the roadway. Traffic was backed up nearly 10 miles behind the crash.

Grant said that besides the truck accident, there were three or four other minor “fender-bender” collisions in the traffic backlog. Traffic remained slow on the interstate northbound into the evening commute.