What is the limit of authority for a shunt order in UGL?

The limit of authority for a shunt order in Under Grade Line (UGL) contexts is indicated by the shunt limit sign. This sign marks the boundary beyond which a shunting operation can take place safely and according to established protocols. It serves as a clear visual cue for operators to know where they have the permission to carry out shunting activities and beyond which they should not proceed without further authority. This is crucial for maintaining safety and preventing accidents in rail operations, as unauthorized shunting beyond this point could lead to conflicts with other movements or breach safety regulations.

In rail operations, other indicators like the end of authority signal or clearance limit sign have different purposes. The end of authority signal signifies that the authority to operate a train or perform certain movements has concluded, while a clearance limit sign defines a particular area of clearance for trains to occupy safely, but does not specifically relate to shunting operations. Similarly, an authority flag would typically be used in different contexts related to train authority, rather than specifically for shunting limits.