William D. Middleton is the author of more than 20 books and many hundreds of articles on rail transportation, engineering, and travel topics. He lives in Charlottsville, Virginia.

George M. Smerk taught transportation at Indiana University for more than 40 years. He has written extensively on urban transportation. The most recent of his five books is The Federal Role in Urban Mass Transportation. He lives in Bloomington, Indiana.

Roberta L. Diehl was a sponsoring editor at Indiana University Press until her retirement. She lives in Bloomington, Indiana.