
Starting on Feb. 1, 1975, the Port Authority of Allegheny County began operating commuter trains between Pittsburgh and Versailles, Pennsylvania, in the Monongahela Valley.
The Port Authority took over the service from the Baltimore & Ohio, which operated six roundtrips between Pittsburgh and Versailles at the time of the Port Authority takeover.
The service used a standard locomotive-hauled train as well as Rail Diesel Cars that often ran in sets of four at one time.
It became known as the PATrain and for awhile under Port Authority operation ridership increased over what it had been during B&O operation.
But ridership began declining after it peaked in 1981 and the Port Authority discontinued the commuter trains to Versailles after they made their final trips on April 28, 1989.
RDC 9171, shown in Pittsburgh on June 27, 1981. The car was built for use by the B&O as a baggage-coach RDC for us in Pittsburgh-Washington-Baltimore Daylight Speedliner service.
Photograph by Robert Farkas