A flashing white light mounted on the roof of the LRV, automatically activated when the horn, whistle or gong are activated and can be manually activated.

• A. Strobe
• B. Switch Crank
• C. General Notice
• D. Train Stop

Answer: (A)

A flashing white light on the roof that activates automatically with the horn, whistle, or gong and can also be turned on manually is a strobe. This kind of light is used to grab attention and improve visibility of the vehicle, complementing the audible warning. The automatic pairing with the horn/whistle/gong ensures the light signals when the train is about to move or warn others, while manual activation gives the operator a way to alert people in specific situations even if the horn isn’t used. The other options refer to unrelated functions: a switch crank controls track switches, a general notice is just a posted instruction, and a train stop is an emergency braking device.