On Form D line 2 authority, when multiple track cars operate, they must?

On Form D line 2 authority, when multiple track cars operate, they must?

• A. Regulate their speed to permit stopping short of equipment ahead
• B. Maintain a fixed speed regardless of signals
• C. Follow the lead car's every maneuver
• D. Use hand signals only

Answer: (A)

When multiple track cars are operating under Form D line 2 authority, the trailing cars must regulate their speed so they can stop short of the equipment ahead. This setup relies on a safe following distance because the lead car may slow or stop suddenly, braking effectiveness varies with load, track, and conditions, and the situation ahead can change quickly. By adjusting speed to ensure you can stop in time, you prevent collisions and maintain safe operation between all cars. Fixed speed regardless of signals isn’t safe because conditions and braking ability aren’t constant, so rigidity can lead to a crash or a run-in with equipment. Following every maneuver of the lead car isn’t practical or reliable in a multi-car setup, and relying on hand signals alone isn’t sufficient to coordinate several cars, especially in dim light or limited visibility.

When multiple track cars are operating under Form D line 2 authority, the trailing cars must regulate their speed so they can stop short of the equipment ahead. This setup relies on a safe following distance because the lead car may slow or stop suddenly, braking effectiveness varies with load, track, and conditions, and the situation ahead can change quickly. By adjusting speed to ensure you can stop in time, you prevent collisions and maintain safe operation between all cars.

Fixed speed regardless of signals isn’t safe because conditions and braking ability aren’t constant, so rigidity can lead to a crash or a run-in with equipment. Following every maneuver of the lead car isn’t practical or reliable in a multi-car setup, and relying on hand signals alone isn’t sufficient to coordinate several cars, especially in dim light or limited visibility.