A Walker man who stopped on the shoulder of Interstate 55, got out of his pickup truck and stepped into traffic has died from his injuries, a State Police news release says.

State Police investigated the crash about 9 p.m. Friday and learned that Joseph Nadeau, 73, was stopped on the southbound shoulder of I-55 in his 1993 Toyota pickup truck.

“For unknown reasons, Nadeau exited his vehicle and stepped into the southbound lane of the interstate,” Trooper First Class Nicholas Manale’s press release says.

Nadeau was hit by a 2011 Chevrolet SUV driven by Judy Thompson, 40, of Brandon, Miss., the release says.

Nadeau was airlifted to University Hospital in New Orleans where he later died.

Thompson, who was wearing a seat belt, was not injured.

Alcohol is not suspected of either driver, the release says. The crash remains under investigation.

The release says motorists should stop on the shoulder of an interstate only as an unavoidable and emergency option.

When it is safe to do so, people should get out of their vehicles while aware of surrounding traffic and stand in a safe place off the roadway, the release says.

Drivers approaching a disabled vehicle should try to move to the lane farthest from the breakdown, or slow to a reasonable speed if unable to change lanes.