Rail assets are the transit vehicles used for support services, including both powered and unpowered vehicles such as locomotives, railcars, and freight cars. Rail assets also extend to the maintenance of way equipment, including all the engines and carriages used on a railway, such as the Braking Systems, HVAC, doors, dampers & suspension and air generation & treatment units (AGTU). Rail assets, also known as Rolling Stock, are often used in the rail transport industry and refer to the railway or wheeled vehicles used by businesses on roadways.