CORPORATIONS: Trailer King

On the road to Detroit's airport, a half-mile-long line of cars crawled along bumper to bumper behind a huge trailer-truck. Suddenly one car swerved out of line, passed the others and drew up alongside the slow-moving truck. Out jumped a barrel-chested, thick-necked man who poked his head in the cab and said: "Why don't you pull over? You're the kind of guy that makes people mad at truckers."

The man who bawled out the truck driver was Roy A. (for August) Fruehauf, 42, president of the Fruehauf Trailer Co. As head of the company which puts more trailers (i.e., freight...