Which term describes a speed that does not exceed 15 MPH?

The term that describes a speed that does not exceed 15 MPH is "Slow Speed." This classification is widely recognized within railway operations and other transportation regulations. "Slow Speed" generally indicates a rate of travel that is limited to ensure the safety of operations, particularly in areas where there may be a higher risk of hazards, such as work zones, stations, or areas with limited visibility.

By defining speeds in this manner, operational standards ensure that trains can respond adequately to conditions that require caution. This terminology helps in setting speed limits that enhance safety protocols, allowing for adequate reaction time to signals, obstacles, or other trains.

In this context, the other terms—like Low Speed, Medium Speed, and High Speed—typically correspond to different ranges of speed that exceed 15 MPH or are set for more general classifications that include higher speed thresholds. Therefore, using "Slow Speed" explicitly identifies that the maximum speed is capped at 15 MPH, which is important for compliance and operational safety.