What does Maximum Authorized Speed (MAS) indicate?

Maximum Authorized Speed (MAS) is defined as the highest speed that a train is permitted to operate according to the Operating Rules and Special Instructions. This threshold ensures that trains can operate safely and efficiently within the parameters set by the transportation authority.

Operating Rules and Special Instructions, which may consider various factors such as track conditions, signal indications, and train types, establish this maximum speed to facilitate safe operations throughout the transit network. By adhering to the MAS, conductors and train crews help prevent accidents and enhance operational safety, making it critical for all train personnel to be aware of and comply with these specified speed limits.

Other options might refer to broader definitions or factors related to train operations, such as general speed limits or average speeds, but they do not accurately capture the specific regulatory nature of MAS within the context of train operations.