What is the maximum speed allowed through 1 Track in Harrison Yard?

The maximum speed allowed through 1 Track in Harrison Yard is significant for maintaining safety and operational efficiency within the yard. When a specific speed limit, such as 20 MPH, is established for a yard track, it is often based on factors such as the physical characteristics of the track, the types of operations occurring in the yard, and safety considerations for personnel and equipment.

In this case, 20 MPH reflects a balance between allowing trains to move efficiently while ensuring that there is sufficient time for crew members to react to any unforeseen circumstances, such as obstacles on the track or other operational hazards typical in a yard environment.

Speed limits in rail yards are generally lower than those on mainline tracks due to the increased likelihood of interactions with other trains and equipment, along with the presence of workers on foot. Thus, 20 MPH serves as a safe threshold that helps to manage these risks effectively while allowing for reasonable operational fluidity.

The incorrect options represent speeds that are either too low, which could hinder operations unnecessarily, or too high, which could compromise safety.