sentences:  The magazine's name referred to the centralized traffic control displays used by train dispatchers to control rail traffic across a given territory.The magazine's well-known cover logo was an Alaska Railroad F-unit.It originally was a mimeographed leaflet by Dean Lewis of Castro Valley, California, and later was published by David Styffe in Southern California; HyRail Productions of Denver, Colorado; then Hundman Publishing, of Edmonds, Washington.