What is a sleeper train?

Sleeper trains are passenger trains that provide sleeping accommodations for overnight travel. They are equipped with beds or bunks, allowing passengers to sleep comfortably while traveling long distances, usually overnight. Sleeper trains are popular in many countries as a convenient and efficient way to travel while saving on hotel costs. These trains often include different classes of sleeping arrangements, such as private cabins, shared compartments, or open bunks, and may offer additional amenities like dining cars and washrooms.