A train or track car must not be operated without a:

• A. Red flag, white light, and at least 6 fusees
• B. Red flag only
• C. White light only
• D. A whistle and bell

Answer: (A)

Protection for any on-track movement relies on visible signals and warning devices so approaching trains and other crews understand that a train or track car is operating there. The red flag serves as flag protection at the rear, signaling that the movement is present and not to pass beyond that point. The white light on the moving end provides clear visibility of the active movement, especially at night. Having at least six fusees spaced along the track creates a safe warning boundary that can be seen from a distance, giving crews time to stop.

Together these elements ensure both day and night visibility and a sufficient warning area around the moving equipment. Without any one of them, the protection is incomplete: a red flag alone doesn’t provide front visibility, a white light alone doesn’t communicate the presence of protection behind you, and relying only on audible signals like a whistle and bell does not create the necessary visible warning for track workers and approaching trains.