Operation on sections outside CST or ABS territories where operators rely on visual observation is called?

• A. Restricted Speed
• B. Pocket Tracks
• C. Line-Of-Sight Operation (2 Car)
• D. No Clearance Area

Answer: (C)

Line-of-sight operation is used when trains run outside signaled or cab-signed territories, so the crew must rely on visually observing the track ahead, signals (if any), and the movements of trains or vehicles in the area to move safely. This method is why the scenario specifies relying on what the operator can see rather than following fixed signals: the crew looks ahead, uses flag protection if needed, and controls the train accordingly. The “2 Car” tag reflects a practical limitation—shorter consist makes it easier to maintain a clear line of sight and react to any hazards in these non-signaled sections. Other terms describe different concepts: restricted speed is a general rule about slowing down under certain conditions, pocket tracks are sidings used for storing trains, and no clearance area refers to space lacking required clearance, not a mode of operation.