Showe, who was not wearing a seat belt, died of head and chest injuries and was not burned, police said. He was pronounced dead upon arrival at Washington County Hospital. There was no passenger.
The Myersville Volunteer Fire Co. extinguished the flames.
Police said alcohol was not involved.
Thomas Lee Turner III, the son of Turner's Taxi and Turner Transportation owner George Franklin Turner Sr., said Showe had been working for the company on and off for the past 30 years. He was either the second or the third driver hired by the company.
Showe also worked as a cab dispatcher, reupholstering vehicles and in delivery services, Turner said. He was delivering packages for Turner Transportation at the time of the accident.
Turner said it was the first fatal accident involving a company driver that he can remember.
The company recently plastered its headquarters with flyers notifying its drivers of a new, tougher seat belt law that took effect Oct. 1 and urging them to buckle up, Turner said.
"He knew about it. I guess nobody ever thinks that they'll be in an accident."
Turner said the man also worked at times for the Dagmar Hotel, driving their van.