What should be done prior to conducting inspections on passing trains?

Prior to conducting inspections on passing trains, ensuring a safe location is critical. This step is essential to protect both the inspector and any crew members nearby. A safe location allows for adequate distance from the tracks to minimize the risk of accidents or injuries caused by moving trains.

Selecting a safe spot provides the opportunity to observe the train without being in harm's way, ensures compliance with safety regulations, and promotes an organized process for inspections. The other options, while they may have relevance in different contexts, do not prioritize the safety aspect as effectively as confirming a safe location does. For instance, waiting for a train to stop may not be practical or possible in many situations, while checking the train's schedule relates more to timing than to safety. Additionally, using a communication device, while important for coordination, does not address the need for a safe environment where inspections can be carried out without incidents. Therefore, establishing a safe locality is the first and most important step before any inspection takes place.