The first new diesel, the six-axle SDP40F (a variation based on the venerable SD40-2) wasn’t a success. Fortunately Amtrak was thinking ahead and had a design for a shorter-range four-axle diesel in ...

The Amtrak Floridian navigates street trackage on the former Monon main line at Lafayette, Ind., in late 1976. EMD SDP40F No. 606 leads. Bill Raia photo, Brian M. Schmidt collection With this as ...