What speed must a push-pull train not exceed when approaching a distant signal in an interlocking?

When approaching a distant signal in an interlocking, a push-pull train must not exceed a speed of 40 MPH. This regulation is put in place to ensure that the train can respond effectively to signals and potential stops within the interlocking area, which often involves managing complex train movements and ensuring safety.

Maintaining this speed allows the crew adequate time to react to any changes in signals or track conditions, which is critical in an interlocking environment where multiple routes may converge. The adherence to this speed limit enhances safety and operational efficiency in busy rail networks.

In interlocking situations, exceeding the established speed limit could hinder the ability to stop in time for a signal indication, potentially leading to safety hazards such as collisions or derailments. Therefore, the limit of 40 MPH is set to provide a balanced approach to safety and operational efficacy for trains approaching signals in these critical areas.