What is the requirement for inspecting trains when passing over 2 consecutive detectors?

The requirement for inspecting trains when passing over two consecutive detectors is based on the safety protocols that monitor train conditions. When passing over the detectors, if no issues are indicated and the speed is 8 mph or less, there is no requirement for an inspection. This is because the low speed allows for a safe passage while assuming that the train is functioning normally, as indicated by the detector's readings.

This approach prioritizes operational efficiency while still ensuring that safety standards are met. Conversely, if issues are indicated, an inspection would be required to address any potential safety hazards. Similarly, requirements may also differ based on the train's operational state, like whether it is stopped or moving above a certain speed. However, in the case where detectors show no problems and the train is moving slowly, the established protocol allows for seamless transit without unnecessary inspections.