What is the maximum speed through an interlocking under rule 279?

The maximum speed through an interlocking under rule 279 is specifically set at 12 MPH. This rule is in place to ensure the safety of train operations in areas where there are complex track configurations and potential conflict points between trains. Maintaining this speed allows engineers to react quickly to any signals or obstructions they may encounter, reducing the risk of accidents.

By enforcing a limit of 12 MPH, it ensures that engineers can adequately assess the status of signals and track conditions while passing through interlocking areas, where the risk of miscommunication or signal failure is higher. This rule reflects the balance between operational efficiency and necessary safety precautions, as operational speeds higher than this could lead to difficulties in stopping or navigating through the intersecting tracks effectively.

While other speeds mentioned may be associated with different contexts or regulations, they do not apply to the interlocking scenario outlined in rule 279, reinforcing the significance of the established limit of 12 MPH for safe rail operations.