The Virginia Flyover - McAfee Knob - Appalachian Trail

Question: What is the longest passenger train in the U.S., when measured from engine to the final car?

Answer: Amtrak’s Auto Train. The train, including its passenger cars, vehicle carriers, and staff quarters, is three-quarters of a mile long. It offers non-stop service for passengers and their cars between Lorton and Sanford, Florida, a 16.5-hour overnight trip.