What does a magenta circle with "HS#" signify on a chart?

A magenta circle with "HS#" on a chart signifies a hot spot, which is an area on an airport runway or taxiway identified as having a higher potential for a collision or incident due to its geometry, traffic patterns, or other hazardous conditions. This marking alerts pilots and ground personnel to exercise increased caution when navigating in those areas. Recognizing hot spots is crucial for maintaining safety and situational awareness, particularly in busy airports where multiple operations may be taking place simultaneously. The designation helps to heighten awareness of potential risks, making it an essential feature for pilots when reviewing their charts.