Under what condition is warning at a crossing not required?

The condition in which warning at a crossing is not required occurs when it is clearly seen that no traffic is approaching. This situation implies that there is a clear line of sight for the conductor or the operator, which allows them to evaluate the surrounding environment and confirm that there are no vehicles or pedestrians that would warrant the need for warning signals. In circumstances where visibility is unobstructed, the requirement for additional warnings is obviated since safety can be assured based solely on visual observation.

In contrast, situations where gates are fully raised, a train is going over the crossing, or lights are flashing continuously all indicate that there are active warnings or conditions that necessitate caution. The presence of gates and flashing lights serves as active notifications to safely alert vehicular and pedestrian traffic of an imminent hazard, while the movement of a train requires heightened awareness and precaution, thereby invalidating the necessity of determining whether traffic is approaching.