What is the purpose of an MA-1 overrun barrier?

The primary purpose of an MA-1 overrun barrier is to stop tricycle landing gear aircraft that do not have tail hooks. These barriers are designed to prevent aircraft from overrunning the runway end area during an aborted takeoff or landing, providing a critical safety feature in aviation operations. The barrier works by engaging the aircraft's landing gear, thereby stopping it safely and preventing potential accidents or damage that could occur if the aircraft were to continue past the runway limits.

While the other options may relate to general airport operations or safety measures, they do not accurately reflect the specific function of the MA-1 overrun barrier. For example, slowing down taxis might be a consideration for different types of barriers but is not the primary purpose of the MA-1. Similarly, blocking unauthorized access and aiding in maintenance pertain to different aspects of airfield or facility management and do not capture the life-saving intent behind the design of the MA-1 barrier.