What is the effect of an en-route failure of cab signals on a train's speed in 562 territory?

In 562 territory, if there is an en-route failure of cab signals, the standard procedure dictates that the train must operate at Restricted Speed. This rule is in place to ensure safety, as a loss of cab signal functionality means the train can no longer receive necessary speed and stop signals, which can lead to potential hazards if the train continues at its previous speed.

Restricted Speed allows the train to move but requires the engineer to maintain a speed that will permit stopping within visible distances. This precaution helps avoid collisions and ensures that the train can respond to any unforeseen conditions in the track ahead. Therefore, operating under Restricted Speed is a necessary safety measure following a cab signal failure, as it mitigates the risk of accidents that could occur if the train were to maintain its previous speed.

In 562 territory, the other options either suggest unsafe or impractical responses to the situation. Hence, the correct understanding is that the train must adjust its speed to Restricted Speed to comply with safe operating procedures when cab signals fail.