Most in the US would call them "cars" -- flat car, passenger car, coal car, tank (or tanker) car, box car.

The individual units designed to carry passengers on a train are most commonly called carriages (in British English) or passenger cars (in American English). Within these cars, you will find different "accommodations" based on the train's purpose. The most basic type is the coach (or chair car), where passengers sit in rows. Long-distance trains feature sleeping cars (sleepers), which contain private compartments or "roomettes" with beds. Other specialized parts include the dining car (the restaurant), the lounge car for socializing, and the observation car, which often features large windows or a glass dome for viewing the scenery. In some regions, a car that combines multiple functions is called a combine. In 2026, modern high-speed trains often refer to these units as trainsets or modules, but the classic terms "carriage" and "coach" remain the standard terminology for travelers and rail enthusiasts worldwide.

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Excellent question! The parts of a train dedicated to passengers have specific names, which can be broken down into two main categories: the types of passenger cars and the interior features of those cars.

1. Types of Passenger Cars (The Rolling Stock)

These are the individual vehicles that make up the passenger section of the train.

• Coach Car (or Carriage): The standard, most common car with rows of seats. They can be:
  • Open Coach: One large open space with a central aisle.
  • Compartment Coach: Divided into smaller, private compartments (common in older and some European trains).
• First Class / Business Class Car: Similar to a coach but with more spacious seating, fewer seats, and often additional amenities (e.g., complimentary food, power outlets, more legroom).
• Dining Car (or Restaurant Car): Contains tables and chairs where passengers can order and eat full meals prepared in an onboard kitchen.
• Café Car / Bistro Car / Lounge Car: A more casual car with a counter serving snacks, drinks, and light meals. It usually has seating, often with tables.
• Sleeping Car (or Sleeper): Contains private rooms (roomettes, bedrooms, compartments) with beds for overnight journeys. Operated by companies like Amtrak (USA) or on international night trains.
• Couchette Car: A more basic European-style sleeping car with simple bunk beds in compartments, offering less privacy than a sleeper.
• Observation Car / Dome Car: Features large windows, often curved or elevated (a glass “dome”), to provide panoramic views of the scenery. Common on scenic tourist railways.
• Baggage Car: While not for passengers, it’s often part of a passenger train to carry checked luggage, bicycles, and sometimes mail.
• Control Car / Driving Trailer: On trains without a locomotive at both ends, this is a passenger car at the opposite end that has a driver’s cab for controlling the train when pushing in reverse.

2. Interior Features & Parts of a Passenger Car

These are the components inside the cars that passengers interact with.

• Seats: Configured in rows, bays (facing each other), or compartments. They can be reclining seats and often swivel to face the