The Viewliner is a single-level railroad car type operated by Amtrak on most long-distance routes operating east of Chicago. The first production cars, consisting of an order of 50 sleeping cars, entered service in 1994. From 2015-2016, 70 Viewliner II baggage cars entered service. The new baggage cars are used on all Amtrak trains with full baggage cars, both single-level and bi-level, and replaced all of the Heritage Fleet baggage cars that Amtrak inherited from the freight railroads when it was established in 1971. From 2016-2019, 25 Viewliner II dining cars entered service, which replaced all of the Heritage Fleet dining cars. In 2019, 10 Viewliner II baggage-dormitory cars entered service. The last cars to enter service were 25 Viewliner II sleeping cars in 2021.

Amfleet is a fleet of single-level intercity railroad passenger cars built by the Budd Company for American company Amtrak in the late 1970s and early 1980s. Budd based the Amfleet design on its earlier Metroliner electric multiple unit. An initial order for 57 cars in 1973 to supplement the Metroliners on the Northeast Corridor grew to two orders totaling 642 cars, sufficient to reequip all the services on the Northeast Corridor and many other routes around the United States. The first 492 cars, known as Amfleet I and completed between 1975 and 1977, were designed for short-distance service. A second order of 150 cars, known as Amfleet II and completed between 1980 and 1983, were designed for long-distance service. They were the last intercity passenger cars built by Budd.