How is Limited Speed defined for passenger and freight trains?

Limited Speed is defined in terms of specific speed thresholds for different types of trains. In this context, the definition states that for freight trains, Limited Speed is a maximum of 40 MPH, while for passenger trains, it is set at a maximum of 45 MPH. This distinction reflects the safety and operational protocols that aim to manage the varying speeds that are appropriate for different types of rail services.

Understanding this definition is crucial because it establishes parameters for train operations that ensure safety and efficiency on the railway system. Recognizing the limitations set on speed helps in planning train movements, scheduling, and ensuring compliance with safety regulations.

The other options suggest either lower speeds that do not correspond to established definitions or fail to differentiate between passenger and freight trains, which is essential given their different operational contexts.