When is a train considered delayed in block?

A train is considered delayed in block when it stops or its speed drops below a specific threshold, specifically below 10 MPH. This standard is important because it provides a clear guideline for determining when a train's movement is significantly hindered within a block of track, which can impact the overall efficiency of rail operations and scheduling.

When a train is moving at or above this speed, it is typically still considered to be operating effectively within the rail network. However, dropping below 10 MPH indicates a significant reduction in pace, likely due to operational issues or restrictions that could lead to delays impacting both the train and other operations on the rail line. This definition ensures that all personnel involved in train operations can uniformly assess and respond to situations regarding delays and safety on the railway.