What must employees do if a signal fails to display its most restrictive indication?

When a signal fails to display its most restrictive indication, the priority for safety and adherence to protocols is paramount. In this situation, employees must stop immediately and warn others to prevent potential accidents or unsafe scenarios. This action helps to ensure that all crew members and any other personnel in the vicinity are aware that a signal issue has occurred, which may impact operations.

Stopping immediately allows the crew to assess the situation thoroughly and engage in the appropriate troubleshooting or communication procedures, such as contacting the dispatcher or waiting for further instructions. By warning others, they help maintain safety in the area, as others may not be aware that a signal malfunction has occurred. This response emphasizes the importance of cautious and responsible management of unexpected signal failures in rail operations to protect both personnel and equipment.