At what speed should trains be operated when conditions restrict visibility?

Operating trains at a speed that allows crew members to observe and comply with signal indications is crucial during conditions that restrict visibility. When visibility is diminished, such as in fog, heavy rain, or snow, the ability of the crew to see signals and other important trackside indicators is compromised. Therefore, adjusting the speed to a level where crew members can safely observe signals ensures that they can react appropriately to any changes or warnings.

This practice maintains safety and reduces the risk of incidents caused by missed signals. It also allows train crews to have enough time to respond to the signals they manage to observe, ensuring that they can operate the train within the established safety protocols even under challenging conditions. Operating at a speed that complies with visible signal indications is a standard safety protocol in train operations, particularly when adverse weather conditions are present.