If all auxiliary lights fail but the headlight remains operable, what speed limit applies?

When auxiliary lights fail but the headlight is still operational, the regulations typically require a reduction in speed to ensure safety during operations, particularly at public crossings. This emphasizes situational awareness, as auxiliary lights serve to enhance visibility for both the train operator and other road users, especially at points where trains interact with road vehicles.

The choice to implement a speed limit of 20 MPH over public crossings reflects an established safety precaution. This reduced speed helps mitigate risks associated with poor visibility and provides additional reaction time for operators and any nearby vehicles or pedestrians.

The other speed limits mentioned do not address the specific concern that arises from the failure of auxiliary lights. For example, the speed limits indicating conditions remain “good” or in tunnels do not take into account the specific safety needs that emerge when visibility-enhancing equipment is nonfunctional. Thus, adhering to the 20 MPH limit over public crossings ensures that safety remains the priority in scenarios where visibility is compromised.