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Superliner (railcar)
The Superliner is a bilevel passenger car used on long-haul Amtrak 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 Pullman's successor, Bombardier Transportation. As delivered, the cars came in various configurations, including coach, diner, and sleeper.
== Design ==
The Superliners were the first Amtrak car type to be equipped with an onboard waste treatment and disposal system linked to all toilets. The initial design of this system retained toilet wastes until the train attained a preset speed (or a manually operated lever was moved) to dump the waste along the tracks beneath the moving train. Eventually a full-retention system was installed that stopped this practice. Initially the cars could not be worked east of Chicago because of limited overhead clearances, but by the 1980s many eastern railroads had raised clearances on their tracks to permit tri-level auto carriers, and double-stack container trains, which also permitted the operation of the Superliners.〔
The Superliner I and Superliner II differed somewhat in interior fittings,〔(【引用サイトリンク】title=Differences Between Superliner I and II Cars )〕 primarily in color - the newer cars tended toward gray, aquamarine, and salmon rather than the shades of brown and orange favored on earlier cars. Interior color schemes have become more similar as both fleets have gone through renovation programs in the 2000s. Externally, the two classes differ in a number of subtle respects, but they are readily distinguished by the type of truck (bogie) the car uses: Superliner I cars use a German design originally fitted with an air bag suspension (replaced with springs), while the Superliner II cars use a General Steel Castings truck of the same type used on Horizon, Viewliner, and the original self-propelled 1969 Metroliner cars.
The Superliner has a maximum speed of .
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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