Which statement is true regarding radar separation when aircraft are at least 40 miles away from the radar?

When aircraft are at least 40 miles away from the radar, maintaining radar separation enhances safety during high traffic periods. At such distances, radar accuracy and the ability to track the aircraft become less reliable. Therefore, by ensuring that aircraft are separated by a safe distance, air traffic control can effectively manage the increased complexity and density of air traffic during peak times. This approach minimizes the risk of conflicts and potential collisions, leading to safer operations in the airspace.

In contrast, the other choices suggest misconceptions regarding radar separation. For instance, the idea of increased collision risk when aircraft are far from radar contradicts the emphasis on safety and separation. Proximity management does not necessarily mean allowing closer spacing of aircraft; rather, it's about maintaining safe distances. Lastly, while regulations govern radar separation, the correct emphasis is that it is not just about compliance but also about actively enhancing safety during busy periods.