What is the purpose of a Building Restriction Line (BRL)?

The purpose of a Building Restriction Line (BRL) is to limit building heights near an airport. This is crucial for ensuring that structures do not interfere with the safe operation of aircraft both during takeoff and landing. By controlling the height of buildings in proximity to the airport, the BRL helps to maintain clear airspace and minimize potential hazards for pilots, as well as reducing the risk of accidents involving low-flying aircraft. It is an essential aspect of planning and zoning around airports to preserve flight safety and to comply with regulatory requirements.

While the other options address different aspects of airport operations and safety, they do not directly relate to the primary function of the BRL, which is specifically focused on height limitations to safeguard aviation activities in the vicinity of airports.