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With the help of a video expert, we analyzed the video containing the situation just before the accident.

It was analyzed that 16 people were gathered in a space of 1 m in width and height, that is, 1 square meter.



This is reporter Jung Gu-hee.



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is the situation at 10:20 p.m. at the time of the Itaewon disaster.



I reconstructed and analyzed it in 3D with an imaging expert.



It was found that 16 people are densely packed in a narrow space of 1m wide and 1m long.



Conservatively, it is judged to be 15 people, and it was analyzed that there are 10 to 15 people per square meter in other areas.



Assuming a height of 165cm and composing it with computer graphics, the maximum number of people who can stand within 1㎡ is 15 people, which is a level that can be achieved only when the feet are intertwined and the body is tightly attached.



[Hwang Min-goo / Director of Forensic Image Analysis Lab: Should I say that it is stuck because it is compressed?

His posture is so bent that he can't control his posture, so he hugs him tightly.]



Because people have an instinct to avoid objects or other people, they make a way to avoid others when passing through an alley.



A person who cuts in the middle will slow you down and cause congestion, but if you have space, you will find your way again.



However, as the population density increases, neither the instinct to find the way nor the individual judgment becomes useless and becomes entangled.



A study from the University of North Carolina found that when there were more than six people per square meter, people were unable to move in the direction they wanted and would be stuck in place.



If there are more than 6 people, it can be dangerous.



The width of the entrance of one road in the alley where the accident occurred was 5.5 m, but the width of the point where the accident was concentrated was narrowed to 3.2 m, making the crowding more serious.



There was no way to avoid danger because crowds flocked to the alleyways and there was no police dispersal measures.



(Screen source: HERMES, Germany)