What is the term used for Maximum Authorized Speed?

The correct term for Maximum Authorized Speed in railroad operations is "Normal Speed." This term refers to the maximum speed at which a train can operate under normal conditions and is established according to the specific operational guidelines and safety protocols set forth by the railway authority. Adhering to this speed is crucial for maintaining safety standards, preventing accidents, and ensuring efficient train operations.

The other terms listed do not accurately reflect the concept of Maximum Authorized Speed. "High Speed" may imply speeds greater than normal but could also refer to speeds associated with high-speed rail services that involve different criteria and considerations. "Full Speed" can be ambiguous and does not convey the regulatory aspect of maximum allowable operations. "Exceeding Speed" refers to speeds beyond the limits supplied by operational protocols, which directly contradicts the concept of Maximum Authorized Speed. Thus, "Normal Speed" is the most appropriate and widely recognized term in this context.