If a train is operating under permission in 251/261 according to Rule 556, what is the maximum speed it can travel?

The maximum speed a train can travel while operating under permission in 251/261, according to Rule 556, is 59 mph. This speed limit is established for trains in a permissive signal state, allowing them to operate safely under certain conditions.

Rule 556 governs the operation of trains under specific permissions issued by the dispatcher or signal operator when normal signal indications are not feasible. The speed of 59 mph is designated to maintain safety while balancing operational efficiency, ensuring that the train can safely respond to any changes in the track conditions or signals.

Having this speed limit ensures that even when a train is subjected to a less restrictive signaling situation, it can operate within safe parameters while adhering to set guidelines established to manage train movements effectively. This speed takes into consideration the level of control and management of the train's journey, enhancing overall safety on the rail network.