

The Superliner is a double decker passenger car used by Amtrak on long haul trains that do not use the Northeast Corridor. The initial cars were built by Pullman-Standard in the late 1970s and a second order was built in the mid 1990s by Bombardier Transportation.

The EMD GP30 was a 2,250 hp (1,680 kW) four-axle B-B diesel locomotive built by General Motors Electro-Motive Division of La Grange, Illinois between July, 1961 and November, 1963. 948 examples were built for railroads in the United States and Canada (2 only), including 40 cabless B units for the Union Pacific Railroad.

The EMD DDA40X was a 6,600 traction hp (4.9 MW) D-D diesel locomotive built by General Motors' Electro-Motive Division of La Grange, Illinois for the Union Pacific Railroad. Forty seven locomotives of this type were built between June 1969 and September 1971, and numbered from UP 6900 to UP 6946.
The first locomotive, UP 6900, was delivered in time to participate in the celebrations of the centennial anniversary of the completion of the transcontinental railroad by driving a golden spike at Promontory Summit, Utah. The class was therefore named Centennial by the Union Pacific.

The DDA40X is 98 ft 5 in (30 m) long, and is the longest diesel locomotive ever built. The frames were fabricated by an outside contractor, the John Mohr Company of Chicago, since the locomotive frame length exceeded the abilities of EMD's plant. It remains the most powerful American diesel locomotive type ever built and is one of the most powerful in the world, exceeded only by the Soviet multi-unit designs such as the most powerful of them, the 4TE10S, which on other hand should be competed with the similar ones, for instance the largest and most powerful such locomotive (set), the 8-unit A-B-B-B-B-B-B-A EMD F7. A 4-unit DDA40X lash-up was common for the 1973-1975 period. The DDA40X comprises two diesel engines, each providing 3,300 traction hp. Although the most powerful American diesel locomotive ever built, it was far from the only dual engine locomotive built. The EMD E-series was one of the more popular dual-engine locomotives, and other manufacturers had produced locomotives utilizing up to 4 diesel engines. Baldwin Locomotive Works (BLW) produced a prototype that was to contain 8 V8 diesel engines but it never went into production.[1]