How must a train proceed in 261 territory when cab signals fail?

In 261 territory, when cab signals fail, the correct procedure requires that the train must operate according to the indications of fixed signals, provided that the cab signals are not operable. The principles underlying this procedure emphasize safety and the need to rely on visible signal indications when electronic systems like cab signals are compromised.

If the cab signals are still functional, the train can utilize both fixed and cab signal indications, enhancing communication and safety measures. This dual-indication system allows for a higher level of operational awareness, ensuring that any potential hazards can be managed effectively.

Thus, operating according to fixed signal and cab signal indications, if the latter are still functioning, remains the safest method for train movement in 261 territory during cab signal failures. This approach protects against unauthorized movements and helps maintain speed restrictions and stopping distances as dictated by the signals present along the route.