a railroad car, also known as a railway car, is a vehicle designed to be used on a railway system for transporting goods, passengers, or both. There are various types of railroad cars, including freight cars for carrying cargo, passenger cars for accommodating travelers, combination cars that serve both freight and passenger purposes, and special-purpose cars tailored to specific industry needs. These cars are connected together to form a train, and they play a crucial role in facilitating the transportation of goods and people across railway networks worldwide.