In railroad terminology, what does the term "normal speed" refer to?

In railroad terminology, "normal speed" typically refers to the maximum speed allowed for trains to operate safely under regular conditions. This speed is determined by various factors such as the type of train, track conditions, and safety regulations. It ensures that the train can operate efficiently while adhering to safety standards, allowing for safe stopping distances and the ability to navigate curves and points effectively.

The concept of normal speed is built around the idea that trains have specified speed limits to ensure safety and operational efficiency. While certain other speeds or limits may be in place for different types of trains or specific conditions, "normal speed" is universally understood as the highest speed a train can reach without compromising safety or regulatory compliance.