0 a bed in a train or on a boat that can either be folded away or used as an ordinary seat during the day
Admittedly, you could transport all animals in air-conditioned buses with couchettes; it is technically feasible.
These trains have coaches, a dining car and a sleeping car or a couchette car or sometimes both.
Since then, the entire fleet of sleeping, couchette and seated cars has been fully air-conditioned.
Services ran overnight and passengers were carried in sleeping cars and couchettes.
Generally, the trains consist of sleeping cars with private compartments, couchette cars, and sometimes cars with normal seating.
They offer open or compartment passenger coaches (1st and 2nd class), couchette cars and sleeping cars.
Instead, they were coupled to retired couchette cars (type "yl") that were homologated for 200 km/h.
To facilitate the carriage of luggage, either combined couchette and luggage cars are used or seated cars with a special luggage/bicycle compartment.