Which type of signaling is preferred for high-traffic areas under NORAC?

Automatic signaling systems are preferred for high-traffic areas under NORAC because they enhance safety and efficiency in train operations. These systems are designed to automatically provide real-time information and instructions to train crews, minimizing the need for manual intervention. This is particularly important in high-traffic areas where maintaining smooth and safe operations is critical due to the potential for congestion and the increased risk of accidents.

Automatic signaling systems can adjust signals based on train movements, speed, and track conditions, allowing for quicker responses to changing circumstances. This level of automation helps reduce human error, which can be a significant factor in operational incidents, especially where traffic levels are high. Additionally, the use of automatic systems can facilitate better communication and coordination between different trains and control centers, leading to improved overall performance.

In contrast, manual signaling systems rely on human operators, which can introduce delays and potential errors, while visual signaling systems, although important, may not provide the same level of real-time responsiveness as automated systems. Fallback signaling systems are typically used in emergencies or as backup, thus they are not the preferred option in high-traffic environments where consistent and reliable signaling is essential for safety and efficiency.