Harris County Sheriff Ed Gonzalez said in a tweet at about 5:45 a.m. Friday that his deputies responded to 1755 Terminal Rd., which is off Federal Road and south of I-10, for a fatal crash involving a train.
Gonzalez said that according to initial information, a conductor was standing at the rear of the train as it backed out of a private rail yard.
Authorities believe the conductor was trying to guide the train's engineer as it reversed, when an 18-wheeler crossed the tracks at the same time, possibly pinning the conductor against the truck.
The man died at the scene.