The sleeping car or sleeper (often ) is a railway/railroad passenger car that can accommodate all its passengers in beds of one kind or another, primarily for the purpose of making nighttime travel more restful. The first such cars saw sporadic use on American railroads in the 1830s and could be configured for coach seating during the day. Some of the more luxurious types have private rooms, that is to say fully and solidly enclosed rooms that are not shared with strangers.

In the United States

United States

The United States of America is a federal constitutional republic comprising fifty states and a federal district...

 today, all regularly scheduled sleeping car services are operated by Amtrak

Amtrak

The National Railroad Passenger Corporation, doing business as Amtrak , is a government-owned corporation that was organized on May 1, 1971, to provide intercity passenger train service in the United States. "Amtrak" is a portmanteau of the words "America" and "track". It is headquartered at Union...

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