오차율을 이용한 교통존 특성별 통행발생량 조정계수 산정 연구

추상호(Choo Sang-Ho),이향숙(Lee Hyang-Sook),신천규(Shin Cheon-Gyu) 대한국토·도시계획학회 2012 국토계획 Vol.47 No.4

The paper estimates adjustment factors for trip generation by traffic analysis zone characteristics based on the trip error rates between forecast and estimated data. We collect both 2006 forecasts using the 2002 household survey and 2006 estimates using the 2006 household survey in the Seoul metropolitan areas, and explore trip error rates and patterns according to the trip purposes. This research obtains various socio-economic variables affecting the trip rate errors and conduct the correlation analysis. For the factors having correlations, proper strata are defined, respectively, and verified if they are statistically reliable through the analysis of variance. Then, the average adjustment factor and its range considering the standard deviation are generated at each stratum. Our results indicate that the four types of trips (i.e. total, commute, school, business) have adjustment factors. Finally, the adjusted trips are compared with the existing forecasts to evaluate the applicability of the adjustment factors. As results, the adjusted trips show lower trip error rates via RMSE(Root Meet Squre Error)%.

대중교통 이용자 만족도에 미치는 요인 분석

추상호(Sang Ho Choo),이향숙(Hyang Sook Lee),강동수(Dong Soo Kang) 서울연구원 2012 서울도시연구 Vol.13 No.3

도시 시설 특성을 반영한 고령 보행자의 사고 심각도 모형 개발

최성택 ( Sung Taek Choi ),이향숙 ( Hyang Sook Lee ),추상호 ( Sang Ho Choo ),김수재 ( Su Jae Kim ) 한국안전학회(구 한국산업안전학회) 2015 한국안전학회지 Vol.30 No.1

This study analyzes the influence factors on elderly pedestrian accident. Elderly people are easy to be badly injured by car accidents compared to younger people. Therefore, various plans and measures are required to protect elderly pedestrian from accidents. However, pedestrian accidents studies only focused on microscopic factors such as attribute of driver, pedestrian, road design. In order to prevent pedestrian accident and reduce the severity of the accident, not only microscopic factors but macroscopic variables such as urban planning and facility should be considered. In this regard, this study develops an ordered probit model introduced the characteristics of urban facility which were not considered in the previous studies. The result shows that there is higher level of accident severity in suchareas as large commercial area, well-developed area with transportation infrastructure service and non-pedestrian safety zone. Thus, various and appropriate countermeasures should be prepared in order that pedestrian accident can be prevented in the areas mentioned above. In addition to the aforementioned variables, it is revealed that other variables including vehicle speed, gender and age of pedestrian, weather condition, type of vehicle, etc. partly affect the severity of pedestrian accident.

근린생활권 단위의 압축도시개발이 통행수단분담율과 자족성에 미치는 효과분석

성현곤(Sung Hyun-Gon),추상호(Choo Sang-Ho) 대한국토·도시계획학회 2010 국토계획 Vol.45 No.1

This study has been aimed to identify the effects of compact-city development at the living area of neighborhood level on transportation policy measures in the capital region. For the purpose of it, the study established the regression analysis model of compact-city planning elements to modal split and inner-travel ratio. The planning elements are defined as Density, Diversity, Design and Accessibility. The analysis results demonstrate that compact-city planning should be applied to the capital region at the neighborhood level to reduce car-oriented travel pattern. In addition to it, the results suggest that policy measures of both modal split and self-sufficiency might not be simultaneously accomplished by compact-city planning. For example, both population density and rail accessibility have a positive impact on reducing car split while they have a negative impact on self-sufficiency and inner-travel ratio. It means that compact-city planning at the neighborhood level need to be applied to achieve either of them, not both.

베이비부머세대의 통행행태에 관한 연구

박성경(Park, Sung-Kyung),황기연(Hwang Kee-Yeon),추상호(Choo Sang-ho) 대한국토·도시계획학회 2014 국토계획 Vol.49 No.2

The Korean baby boomer generation (born in 1955-1963) is about 6.9 million people, representing 14.6% of the population in 2010. They will become seniors by 2030, and playa major role in changing into a super-aged society. However, there have been, few studies of such age groups in transportation field. Accordingly, this study analyzed characteristics of the baby boomer generation and their travel behavior, and investigated the differences between the baby boomer and pre-boomer (1946-1954) generations. In addition, ordered probit models are developed in order to identify key elements influencing travels of each generation by mode. The model results show that travel patterns of the baby boomer are different from those of the current elderly group. It implies that the current transport policy need to be adjusted to their features when they become the elderly group. Personal, household, and regional characteristics also significantly affect travel of the baby boomer generation. Among them, employment type has the most significant effect on travel.

서울시 지하철 역세권의 공간적 범위 설정과 특성분석

이연수(Lee, Youn-Soo),추상호(Choo, Sang-Ho),강준모(Kang, Jun-Mo) 대한국토·도시계획학회 2011 국토계획 Vol.46 No.7

Regardless of importance of spatial ranges of subway adjacent areas, they have not been well-identified. Furthermore their related developments, policies and legislations employed monotonous spatial ranges, largely based on distances, without clear evidence. Thus, this study is to identify spatial ranges of the adjacent areas of subway stations in Seoul, considering various socio-economic, land use, urban infrastructures, and travel characteristic factors. To this end, subway adjacent areas are classified into five categories based on land use and travel patterns of their subway stations : residential-oriented commercial mix, residential-oriented other mix, commercial center, semi-industrial center, and green center. For each category, we carry out statistical tests for the major factors among the segments of the subway adjacent areas in order to differentiate their spatial ranges and then decide their spatial ranges. In addition, we suggest directions for land use planning and policies by category and range of the subway adjacent areas.

SP조사를 활용한 화물 전환수요모형 구축 연구

이향숙(Lee, Hyang-Sook),추상호(Choo, Sang-Ho) 대한국토·도시계획학회 2014 국토계획 Vol.49 No.8

This study analyzes preference and shift effects of freight modes, based on a sensitivity survey for companies related to Mode Shift Support Business. Freight shift demand models from roads to rails or maritime are developed using the survey responses to travel time, travel cost and shift subsidy scenarios by a binary logit modeling approach. Results of the models for modes(rail/maritime), item(container), line(Seoul-Busan) indicate that the mode shift rate decreases as travel time and cost increase, while showing an opposite pattern in the case of shift subsidy. The container model was more influenced by travel time and cost than the total item model, but the effect by shift subsidy was less great. The value of travel time when taking rail or maritime was 10,618won for 20ft and 21,236won for 40ft. In the case of container, 9,455won and 18,911won, and in the case of Seoul-Busan line, 10,765won and 21,529won were estimated, respectively. The research contributes to improve current systems and establish proper subsidy standards.

서울시 생활권별 보행량 변화에 미치는 요인 분석

이연수(Lee, Youn-Soo),추상호(Choo, Sang-Ho),강준모(Kang, Jun-Mo) 대한국토·도시계획학회 2013 국토계획 Vol.48 No.5

This study is to identify key factors to affect change of pedestrian volumes by neighborhood type. To this end, we first built data about change of pedestrian volumes of administrative dongs between 2006 and 2010 in Seoul, urban spatial characteristic factors using geographical information system, and socio-economic and land use data. Then we developed regression models of pedestrian volume changes by neighborhood unit. In the models, we considered some factors such as social economics index, land use, urban planning, and income, together with urban spatial characteristics. The models results show that the more diverse land use, the higher walking rate. It indicates that mixed land use planning is recommended to promote walking. Furthermore, it turns out that socio-economic and other factors such as gender, age and employment density affect significantly pedestrian volume changes. Finally, such effects on pedestrian volume changes are similar or different, depending on neighborhood unit.

통행발생예측의 오차 보정을 위한 모형 개발

이향숙(Lee, Hyang-Sook),추상호(Choo, Sang-Ho),신현준(Shin, Hyun-Joon) 대한국토·도시계획학회 2014 국토계획 Vol.49 No.1

The paper analyzed error rates between trip generation forecasts and measurement values, and developed regression models for finding a forecast adjustment method. We estimated general linear regression models as well as spatial regression models that consider spatial autocorrelation among analysis regions. Regression models by total, commute, business and other purposes for intra-metropolitan trips and regression models by total, business and other purposes for inter-regional trips were developed, respectively. As results, intra-metropolitan trips showed a higher spatial autocorrelation than inter-regional trips. Spatial error(SE) model was chosen for intra-metropolitan commute trips, while ordinary least square(OLS) model was selected for the others. In cases of inter-regional trips, spatial error(SE) model or spatial lagged(SL) model was suitable for all purpose trips. Based on these models, trip generation forecasts were updated, showing improved RMSE%. The research could contribute to reducing forecast errors and increasing data reliability.

보행로 유형화를 통한 보행로 서비스 수준 평가에 관한 연구

임수연(Lim, Su-yeon),추상호(Choo, Sang-ho),최성택(Choi, Sung-Taek) 대한국토·도시계획학회 2016 국토계획 Vol.51 No.2

KHCM suggested the criterion of LOS for the pedestrian walkway as the one simple standard. Therefore, current LOS estimation process can not provide a comprehensive review considering attributes by walkway type due to the lack of the diversity of criteria. In this respect, this study subdivided pedestrian walkway into the several categories and suggested criteria for pedestrian LOS by walkway type. This paper divided walkway into the 4 categories: pedestrian only walkway, shared space, social path and transfer area. For collecting data related to pedestrian behavior, we conducted field survey in Gangnam-gu, Seoul. The results showed that pedestrian volume, walk speed and density were distinguished by the walkway type. The regression analysis showed that LOS threshold for the pedestrian only walkway is similar to the existing KHCM’s criteria. Threshold of shared space and social path are more strict than the KHCM’s standard. This is because shared space and social path have lots of interrupting and dangerous components than pedestrian only walkway. In conclusion, this study suggest the threshold for pedestrian LOS by type of walkway objectively.