There are several main types of road rail vehicles, depending on the type of vehicle, its application, and the rail gauge on which it operates. Design, operation, and maintenance of the bogie, the wheelsets, and their components for metros, freight, commuter, and high-speed trains.

• Trainset
• Locomotives and Shunters
• Railroad vehicle
• Bogies and Tractions
• Brake
• Coupler
• wheelset