What must be done if a highway crossing warning device may operate due to maintenance work?

When conducting maintenance work that may cause a highway crossing warning device to operate improperly or unintentionally, temporarily taking the device out of service and providing warnings is essential. This action ensures the safety of both motorists and train operations. By deactivating the device, you prevent false signals that could mislead drivers into dangerous situations at the crossing. Providing alternative warnings, such as flagging or signaling to redirect traffic, further enhances safety during the maintenance period. This approach is aligned with the protocols for maintaining a safe work environment and minimizing risks associated with vehicle and train interactions at highway crossings.

Other options do not adequately address safety concerns or the necessary precautions required during maintenance work. Leaving the device active could result in confusion or accidents, completing the work without precautions poses significant risks, and informing only train operators fails to alert motorists who may be affected by the crossing situation.