What is the minimum percentage of operative air brakes required for a train after departing the Initial Terminal?

The requirement for a minimum percentage of operative air brakes for a train departing the Initial Terminal is crucial for ensuring the safe operation of the train. The correct answer indicates that a minimum of 85% of the air brakes must be operative, which aligns with regulatory standards in the industry designed to maintain safety and control during transit.

This mandated percentage helps ensure that in the event of an emergency or need for braking, there is sufficient braking power available to effectively slow down or stop the train. The focus on having a high percentage of operative brakes reflects the need for reliability and safety in train operations, especially considering the load and distances involved in rail transport.

Other options that suggest lower percentages do not meet the established safety standards that prioritize the prevention of accidents and ensure effective response capabilities in various operational scenarios. Thus, maintaining at least 85% of operative air brakes is essential and reflects a compliance measure with safety regulations in rail transportation.