What does "rollby inspection" refer to in rail operations?

"Rollby inspection" refers to a method of examining rail cars as they pass a stationary point. This type of inspection allows personnel to observe the condition of rolling stock while it is in motion, enabling them to detect any obvious issues such as defects or damages that may not be visible when the equipment is stationary. It is an efficient way to maintain safety and operational integrity on the rail network, as inspectors can quickly assess a large number of cars without the need to stop them.

In contrast, the other options involve different inspection methods. Inspecting stationary equipment does not take advantage of the rollby technique, which specifically involves movement. Monitoring track maintenance typically relates to the upkeep of the rails and infrastructure rather than the inspection of rolling stock or rail cars. Lastly, while inspections can be conducted from moving vehicles, this is not the defining characteristic of a rollby inspection; the emphasis is on observing stationary equipment from a fixed point as it rolls by.