지하도로 수요제어 및 차로변경 허용 전략에 따른 운영 효과 평가 - 신월여의지하도로를 중심으로 -

이진각,박상현,고상운 한국도로학회 2024 한국도로학회논문집 Vol.26 No.2

PURPOSES : This study sought ways to connect urban above ground roads and underground roads to utilize urban space more efficiently in the development of underground roads, which are currently under development in order to alleviate problems caused by oversaturated above-ground roads. A simulation analysis was performed to develop an operation strategy that connects above-ground and underground roads to prevent congestion in above-ground areas such as entrances and exits from transferring to underground roads as well as to present its effectiveness. METHODS : Traffic efficiency analysis according to the operation strategy of above ground and underground roads was conducted using VISSIM, a microscopic traffic simulation software. The functions implemented in VISSIM were collected to set effectiveness analysis indicators for each underground road operation strategy. The Shinwol-Yeoui Underground Road was selected as the spatial scope of this study, and a surrounding road network was constructed. In addition, full-scale simulation analysis preparations were completed by performing network calibration based on the actual traffic attribute data of underground and surrounding surface roads within the construction scope. Accordingly, a traffic efficiency evaluation analysis was conducted based on the underground road operation strategy. CONCLUSIONS : Information on the increase in traffic volume within the Shinwol-Yeoui underpass was collected every 15 min. The analysis was divided into an analysis of the traffic situation within the underpass through demand control when the service level reached level D and an analysis of when demand control was not performed. It was found that demand control was necessary for the Shinwol-Yeoui Underpass when the internal traffic volume reached 2,500 vehicles/h. In addition, to analyze the spread of traffic and congestion owing to the weaving phenomenon caused by lane changes in the underpass, an analysis was conducted to observe the traffic improvement effect when full lane changes are possible for the Shinwol-Yeoui Underground Road, which currently has some lane-change-permitted sections. The analysis showed that both the maximum traffic volume and average travel speed showed better results when lane changes were allowed, and the communication situation at Yeoui JCT was found optimal.

지하도로 내 교통 지·정체 발생 가능성 판단 지원 방법 개발

박수빈,문재필,김진국,양충헌 한국도로학회 2022 한국도로학회논문집 Vol.24 No.4

PURPOSES : It is necessary to implement traffic-control strategies for underground roads. In this study, the application criteria for traffic control were developed to minimize actual traffic congestion on underground roads before it occurs. In particular, the traffic congestion judgement criteria and procedure (TJCAP) were developed. They can specifically classify the possibility of traffic congestion underground. METHODS : A microscopic traffic simulation model was used to analyze different scenarios. With the scenario simulation results, a hierarchical clustering analysis was applied to produce quantitative values from the TJCAP for each experimental network case. RESULTS : For network case (a), it was concluded that the possibility of traffic congestion on underground roads increases when the speed of the ground road connected to the main underground road and the connected ground road after the outflow of the ramp section is low. When the connected road is an interrupted facility after entering the underground roads, the red time is long, and when the section travel speed is 15 km/h, the possibility of traffic congestion underground is highest. A cluster analysis based on these results was performed using two techniques (elbow and silhouette) to verify the final classification. CONCLUSIONS : The TJCAP were designed to operate traffic flow with stricter criteria than traffic congestion management on ground roads. This reflects the difference in the driving environment between underground and above-ground roadways.

지하도로 계획 및 기하구조 설계에 관한 연구

김낙석,배성식 한국재난정보학회 2011 한국재난정보학회 논문집 Vol.7 No.1

현재 국내의 지하 도로건설 가능성은 증가하고 있으며, 그동안 건설계획이 꾸준히 진행되어 왔다. 그러나 지금까지 지하도로의 특성, 관련 법규 및 설계 기준에 관한 연구는 활발히 진행되지 못하고 있는 실정이다. 본 연구에서는 이러한 배경을 고려하여 지하도로 건설에 필요한 기초적인 방향제시에 관한 내용을 다루고자 한다. 또한, 지하도로에 관한 국내외 사례를 중심으로 분석하고자 한다. 본 연구를 통한 주요 연구결과는 다음과 같다. 1) 지하도로의 선형 선정 시 지하공간 활용, 기술적요인 및 교통체계가 종합적으로 고려되어져야 한다. 2) 지하도로의 설계속도는 주행중 안전성을 확보하기 위하여 제한속도보다 10km/h정도 상회되도록 건설되어야 한다. 3) 비상상황에 대처하기 위하여 지하도로는 재난방지 시설 계획에 만전을 기하여야 한다. 본 연구의 제약상 지하도로 운전자의 특성에 대한 내용은 충분히 반영되고 있지 못하고 있으나 향후 지하도로 건설에 관한 개괄적인 방향제시에 관한 내용은 다루고 있다는 점에서 그 의의가 있을 것으로 판단된다. Plans of underground roads have been established, and the possibilities of underground road constructions have been growing in Korea. However, the study on characteristics of underground roads, the enactment of law, and the establishment of design criteria haven’t been conducted so far, if any. Based on these backgrounds, the paper presents the basic direction on the construction method of underground roads. It also investigates the needs and characteristics of underground roads and reviews domestic and foreign examples. Major results by implementing the research are as follows: 1) when selecting the route of underground roads, the use of underground space, technical aspects, and traffic systems should be comprehensively considered; 2) the design speed of underground roads will be 10km/h above the speed limit to secure safety; 3) disaster prevention facilities should be planned to connect high traffic management system for coping with unexpected situations. Although this study has a limitation that hasn’t reflected the driver’s characteristics on new spaces such as underground roads, it has some significance that it suggests the major reviewing issues on the construction of underground roads, and presents the direction through the previous study.

VISSIM과 VR 시뮬레이터를 활용한 지하도로 주행행태 분석방안 연구

박상현,이진각,고상운 한국디지털콘텐츠학회 2022 한국디지털콘텐츠학회논문지 Vol.23 No.12

In this study, the driving behavior characteristics of drivers in the underground road were analyzed by using a virtual reality (VR) simulator targeting the Shinwol-Yeoui Underground Road, which was built among domestic underground roads and easy to collect related data. As a result of the analysis, it was analyzed that the head distance between the preceding vehicle during driving and stopping in the underground road was narrower than that of the ground road, and the driver's response when the preceding vehicle was decelerating was significantly lower than on the ground road. Therefore, in this study, the results of the analysis were reflected in VISSIM (Verkehr In Städten - SIMulationsmodell), a micro-traffic simulation, and the observed values ​​for the actual traffic volume and speed of the Sinwol-Yeoui Underpass and the simulation level of the analysis values ​​analyzed through VISSIM were evaluated. analyzed to be very similar to reality. In the future, based on this study, it is expected that related research will be continuously carried out to help prepare design standards that reflect the driving behavior of underpass drivers and furthermore, research for the establishment of laws and standards. 본 연구에서는 국내 지하도로 중 기구축되어 관련 데이터 수집이 용이한 신월여의지하도로를 대상으로 가상현실(VR) 시뮬레이터를 활용하여 지하도로 내 운전자의 주행행태 특성분석을 수행하였다. 분석결과 지하도로 내에서는 주행중과 정지시 선행차량과의 차두간격이 지상도로에 비해 좁고, 선행차량이 감속시 운전자의 반응도가 지상도로 보다 현저히 낮은 것으로 분석되었다. 이에 본 연구에서는 해당 분석결과를 미시적 교통 시뮬레이션인 VISSIM(Verkehr In Städten - SIMulationsmodell)에 반영하여 실제 신월여의지하도로 교통량 및 속도에 대한 관측값과 VISSIM을 통해 분석한 분석값의 모사수준을 평가한 결과 실제와 매우 유사한 것으로 분석되었다. 향후에는 본 연구를 기초로 지하도로 운전자의 주행행태를 반영한 설계기준 마련과 더 나아가 법·기준 제정 등을 위한 연구에 도움이 될 수 있도록 관련 연구가 지속적으로 수행되기를 기대한다.

시뮬레이션을 통한 지하도로 출구부 이격거리와 인접교차로 운영상태에 대한 상관관계 분석

이진각(Jin-Kak Lee),박상현(Sang-Hyun Park),고상운(Sang-Un Ko) 한국디지털콘텐츠학회 2022 한국디지털콘텐츠학회논문지 Vol.23 No.11

In the case of underground roads in urban areas in Korea, there are sections currently being built and operated, such as Sinwol-Yeoui section and Seobu Expressway, and plans for the construction of underground roads are continuously underway to solve traffic problems occurring on the ground in urban areas. In this study, for safe and smooth connection between the underground road and the ground, the correlation between the distance from the exit of the underground road to the adjacent intersection and the operation aspect of the intersection is analyzed. In addition, the correlation between the separation distance between the exit of the underground road and the adjacent intersection and the traffic and operation of the adjacent intersection is simulated and analyzed to ensure safe and efficient operation of urban underground roads. The simulation was conducted using VISIM, and as a result, it was found that the traffic environment of the underground road was more sensitive than the ground road.

주행 시뮬레이터를 활용한 도심 지하도로 유출연결로 접속부 주행행태 분석

정승원,송민수,황순천,이동민,권완택 한국ITS학회 2022 한국ITS학회논문지 Vol.21 No.1

지하도로의 운전자 주행행태는 지상도로와는 다르기 때문에 이를 반영한 도로설계가 필요 하지만, 국내 도시지역 지하도로 설계지침은 대부분 지상도로의 설계기준을 준용하여 설계방 법을 설명하고 있다. 본 연구에서는 주행 시뮬레이터를 활용하여 도심 지하도로 유출연결로 접속부의 운전자 주행행태를 분석하였다. 지하도로 및 지상도로 환경이 대조될 수 있는 시나 리오를 설정하여 가상주행실험을 수행하였고, 세부 구간별로 주행행태 데이터의 비교·분석과 통계적 유의성을 검토하였다. 그 결과, 지하도로에서의 주행속도는 상대적으로 낮고 차로 횡적 이격거리는 인접한 터널 벽체로부터 멀어지려는 행태를 보였다. 이러한 결과를 바탕으로 지하 도로 유출연결로 접속부에서 운전자의 주행안전성을 향상시킬 수 있는 설계방향과 시사점을 제시하였다. Even though driving behaviors in underground roads can be significantly different from ground roads, existing underground roads follow the design guidelines of ground roads. In this context, this study investigates the driving behaviors of the exit-ramp terminal of urban underground roads using a driving simulator. Virtual driving experiments were performed by analyzing scenarios between the underground and ground road environments. The experiments’ driving behavior data for each geometry section are compared and validated through a statistical significance test. This test showed that the speed in the underground road environment is relatively low, and the LPM tends to move away from the adjacent tunnel wall. Based on these findings, this study suggests implications and feasible solutions for improving driver’s safety in the exit-ramp terminal of the underground roads.

FGI 기법을 이용한 도심 지하도로 연결로 접속부 설계요소 도출을 위한 사례 연구

박상현,이진각,양충헌,이준,강영균 한국도로학회 2021 한국도로학회논문집 Vol.23 No.2

PURPOSES : The purpose of this study is to derive specific road design elements for safe urban underground and to adopt measures for minimizing traffic delays and to maintain efficient operation. METHODS : In this study, a qualitative study was conducted using Focus Group Interview (FGI) method to identify significant connection characteristics and develop connections to urban underground roads. Finally, this study analyzes design elements necessary for traffic safety and efficient traffic operation. In addition, relevant case studies were performed with keywords from the FGI method results. Therefore, major design elements were analyzed for urban underground road connection and connection analysis for traffic simulation-based verification. RESULTS : The main characteristics of the connection between the underground roads of the downtown area were divided into three types: traffic flow characteristics, geometric characteristics, and driver behavioral characteristics. From the review of 16 leading studies (10 domestic papers and 6 international papers) according to the characteristics, the main design factors for “traffic flow characteristics” include the traffic volume, design speed, heavy vehicle ratio, and lane change. The important design elements for “geometric characteristics” include the separation distance, number of lanes, slope, lane and shoulder width and the design factors for “driver behavioral characteristics” showed reaction time, driver vision, and driving speed. CONCLUSIONS : The FGI method identified the main characteristics of connections to the underground roads. In addition, the relevant empirical and theoretical research data were considered in case studies, and the design elements were derived and separated spatially based on the features of each design element, establishing a point-specific design element guideline.

공동 붕괴를 유발하는 영향인자 분석 및 기존 공동관리 시스템 평가

이기철(Kicheol Lee),박종호(Jongho Park),최병현(Byeong-Hyun Choi),김동욱(Dongwook Kim) 한국지반신소재학회 2018 한국지반신소재학회 논문집 Vol.17 No.1

본 연구에서는 최근 도심지에서 발생하고 있는 지반함몰에 대하여 도로의 붕괴 가능성을 높이는 지하공동 영향인자에 대한 수치해석적 분석을 수행하였다. 지하공동으로 인한 지반함몰 영향 인자는 서울시에서 제안한 공동관리 등급제를 참고하여 아스팔트 포장층의 두께, 토피고, 공동 폭을 고려하였고, 본 연구에서 추가로 공동의 높이를 선정하였다. 이들 영향 인자들을 다양한 범위 내에서 변화시킨 조건에서 지하공동이 있는 아스팔트 포장층 상단에 집중하중과 등분포하중을 각각 변위제어하여 도로 파괴하중을 분석하였다. 분석된 파괴하중을 토대로 서울형 공동관리 등급제에 대한 적용성을 평가하였다. 해석 결과 공동의 높이가 파괴에 미치는 영향은 크지 않았으며 이외의 다른 인자에 따라 복합적으로 파괴하중이 결정되었다. 또한 파괴하중을 기준으로 한 공동분류 방법은 공동 조건을 기준으로 한 분류 방법보다 더 세밀한 분류가 가능하며 파괴 시 물리적인 현상을 반영할 수 있어 더 합리적인 방법이다. In this study, numerical analysis is performed to determine highly influential factors that increase the possibility of asphalt road collapse due to cavity underneath the road. The considered influence factors on road collapse due to underground cavity were the asphalt layer thickness, the cover depth, the cavity width, and the cavity height. The concentrated load and uniform distributed pressure were applied on the top surface of asphalt pavement layers with different shape of cavity and asphalt thickness. For each analysis case of given cavity and asphalt thickness, failure load was analyzed under displacement controlled condition. Based on the analyzed failure loads, the applicability of the cavity management system developed by Seoul city was evaluated. As a result of the analysis, the effect of cavity height on road collapse was not significant while the other factors considerably influenced road collapse. Consequently, degree of road collapse susceptibility should be classified by failure load rather than by the condition of existing cavity.

지하도로 내 전기차 화재 대응지침 구축

강동효,조성우,김해,유호인,윤일수 한국ITS학회 2023 한국ITS학회논문지 Vol.22 No.5

Recently, along with the continuous increase in the supply of electric vehicles, electric vehicle fire accidents are also showing a rapidly increasing trend. Electric vehicle fires last for a long time compared to fires in internal combustion engine vehicles and have problems with the risk of secondary explosions and the generation of large amounts of smoke. In particular, electric vehicle fires in underground roads, which are semi-enclosed spaces, may amplify the problems of existing electric vehicle fires. On the other hand, there are no domestic response guidelines for electric vehicle fires occurring inside underground roads. Therefore, an awareness of fire accidents was confirmed through a survey of the general public, and electric vehicle fire characteristics and primary considerations were derived from stakeholders related to electric vehicle fires in underpasses. Through this, the guidelines for responding to electric vehicle fires on underground roads were established.

지하도로에서의 분 · 합류 시의 교통운영 및 안전 영향 분석을 위한 시뮬레이션 연구

양충헌(Choongheon Yang),김진국(Jinguk Kim),박상현(Sang Hyun Park),이진각(Jinkak Lee) 한국디지털콘텐츠학회 2021 한국디지털콘텐츠학회논문지 Vol.22 No.10

This study is to analyze the traffic and safety impact across the entire underground road when there is either merging or diverging roadway sections. Also, important implications will be drawn for minimizing potential traffic congestion on the underground roads. VISSIM, a representative micro traffic simulation, was employed to establish two types of toy networks and their specific analysis scenarios. In addition, it was analyzed that the Time-To-Collision(TTC) measure also increased in both cases. However, there was little difference in statistical significance in their mean and standard deviation. The results of this study may not be identical to the actual conditions. However, if the urban underground road is activated in the near future, it will be possible to provide fundamental insight as well as traffic control approaches to minimize traffic congestion in the underground.