At what speed must trains or engines be prepared to stop when approaching Automatic Interlockings after passing the distance signal?

When trains or engines approach Automatic Interlockings after passing the distance signal, they must be prepared to stop at a speed of 25 MPH. This speed requirement ensures safety and control, allowing operators to respond to potential signals or conditions that may necessitate an immediate stop. Automatic Interlockings often involve complex track configurations and the possibility of encountering other trains or obstacles. Maintaining a speed limit of 25 MPH provides adequate reaction time for the crew and minimizes risks associated with navigating through busy or potentially hazardous areas. It is crucial for train operations to adhere to these regulated speeds to ensure the efficiency and safety of rail transportation.