What is the slow speed order applied in the context of certain defects?

The slow speed order, particularly when applied in the context of specific defects, is designed to ensure safety and minimize risk when a train approaches an area with known issues. In many rail regulations, a speed limit of 10 mph is recognized as an appropriate threshold for cautious navigation of potentially hazardous track conditions, such as track defects or signal issues. This speed allows for a careful and controlled passage, providing ample time for the crew to respond to any unforeseen circumstances that may arise.

While the other speed options might also be used in various scenarios, 10 mph is the standard practice in many railroad operations for serious defects to maintain integrity and safety of both the train and the rail infrastructure. This specific limitation effectively balances the need for operational efficiency with the necessity of ensuring safety when working in potentially compromised conditions.