PURPOSES : Under the Traffic Safety Act, the installation and management of transportation facilities (facilities and attachments necessary for the operation of transportation, such as roads, railways, and terminals) must take necessary measures to ensure traffic safety, such as enhancing safety facilities. Recently, railway operators have graded the congestion level inside railway stations and vehicles, addressing safety and convenience issues arising from congestion and providing this information to users. However, for bus-related transportation facilities (such as bus stops, terminals, and transfer facilities), criteria and related research for assessing traffic congestion are lacking. Therefore, this study developed a model for the congestion risk factors of four bus-related transportation facilities and proposed criteria for classifying congestion risk levels. METHODS : This study involved selecting congestion risk influence variables for each traffic facility through field surveys, calculating congestion risk index values through evacuation and pedestrian simulations, and constructing a congestion risk influence model based on the ridge model. RESULTS : The factors influencing congestion were selected to include the number of people waiting, effective sidewalk width, and number of bus stops. As a result of developing congestion risk grades, the central bus stops were determined to be in a severe stage if the Average Waiting Time (AWT) was 2.7 or above. Roadside bus stops were considered severe at 4.2, underground metropolitan transit centers at 3.7, and bus terminals at 5.9 or above. CONCLUSIONS : This study can help establish a foundation for a safety management system for congested areas in transportation facilities. When the congestion risk prediction results correspond to cautionary or severe levels, measures that can reduce congestion risk must be applied to ensure the safety of road users.

1. 서론
    1.1. 연구의 배경 및 목적
    1.2. 연구 범위 및 방법
2. 선행 연구 고찰
    2.1. 교통시설 혼잡관련 지침
    2.2. 혼잡유발 요인 및 정류소 혼잡위험도 관련 연구
    2.3. 기존 연구와의 차별성
3. 현장조사
4. 시뮬레이션 설계 및 분석
    4.1. 시뮬레이션 개요
    4.2. 혼잡위험도 지표 및 영향변수 선정
    4.3. 시나리오 구성
    4.4. 시뮬레이션 결과
5. 혼잡위험도 예측모형 및 혼잡위험도 등급 개발
    5.1. 릿지회귀모형 개요
    5.2. 혼잡위험도 예측모형 개발
    5.3. 혼잡위험도 등급 개발
6. 결론
REFERENCES

• 임준범(한국교통안전공단 모빌리티정책처 책임연구원) | Lim Joonbum
• 이수범(서울시립대학교 교통공학과 교수) | Lee Soobeom (Professor Department of Transportation Engineering, University of Seoul, 163 Seoulsiripdaero, Seoul, 02504 Korea) Corresponding author
• 주성갑(포럼에이트코리아 실장) | Joo Sungkab
• 박준태(한국교통대학교 교통대학원 교통시스템공학과 연구교수) | Park Juntae