Cabin (lorry)

The cabin or cab of a truck is an enclosed space in a truck where the driver is seated. Modern long-haul trucks′ cabs usually feature air conditioning, heater, a good sound system, and seats (often air-suspended).

A sleeper (or sleeper berth or bunk) is a compartment attached to the cab where the driver can rest while not driving, sometimes seen in semi-trailer trucks. They can range from a simple 2 to 4 foot (0.6 to 1.2 m) bunk to a 12 foot (3.7 m) apartment-on-wheels. There are a few possible cab configurations:

...
Wikipedia