Which part of the runway points in the direction of the threshold bar?

The threshold bar is a marking located at the beginning of the runway, denoting where aircraft should begin their landing roll. The Blast Pad, also known as the "stopway," serves an essential function in providing space for an aircraft that may need to abort a landing or takeoff. This area is typically located at the start of the runway and extends beyond the threshold bar.

In this context, the Blast Pad directly points toward the threshold bar, indicating the intended landing area and supporting safety measures. The other terms, like the Runway End Safety Area, the Touchdown Zone, and the Clear Zone, refer to different aspects of runway safety and operations, but they do not directly point in the direction of the threshold bar. The Touchdown Zone is the portion of the runway where the aircraft is expected to first touch down during landing; however, it does not define the direction of the threshold bar itself. The Clear Zone is an area beyond the runway that is kept clear to enhance safety, and the Runway End Safety Area is designed to reduce risks in case an aircraft overruns the runway. Therefore, the answer that describes the portion of the runway that points toward the threshold bar is indeed the Blast Pad.