According to a release, officers from the Department of Public Safety (DPS) responded to the scene on the south service road of I-30, near mile marker 118, at about 6:45 a.m. on Monday.
There, they learned that a woman had pulled over because she had a flat tire and that her family members had come to assist, stopping alongside the eastbound side of the roadway.
The man attempted to cross the highway carrying a spare tire and was struck by a pickup truck traveling westbound. The man did not survive.
According to the release, the investigation remains ongoing.