• Title/Summary/Keyword: Average Travel Distance

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The Utilization Method of Unsold/Unused Land in Urban Development Project Areas : Estimating Feasibility of Temporary Commercial Parking Lots Using CVM (조건부가치측정법(CVM)을 활용한 개발사업지구 내 유휴부지 유료주차장 활용방안 연구)

  • Kim, Tae Gyun;Park, Ji Eun;Yun, Jeong Ran
    • Land and Housing Review
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    • v.10 no.3
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    • pp.57-66
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    • 2019
  • In this study, the author suggests utilizing unsold and unused land as temporary commercial parking lots as a way to raise funds for active public transport use. In addition, reasonable parking fee scheme is suggested by estimating marginal parking fee and marginal parking distance for the commercial parking lots based on the CVM. The author conducts a survey to investigate citizens' opinion on utilizing unsold and unused land in the urban development project area as temporary commercial transport facilities such as parking lots. Based on survey outcome, travel behavior and requirements are analyzed and marginal parking fee and marginal parking distance are estimated through the Contingent Valuation Method (CVM). The results are as follows: in the single-bounded dichotomous choice model, people are willing to pay 216 KRW for 165m in average for 10 minutes and their willingness to pay goes down against reaching distance to the parking lots from 365 KRW for 50m, 295 KRW for 100m, 173 KRW for 200m, and 51 KRW for 300m; in the double-bounded dichotomous choice model, people are willing to pay 285 KRW for 165m in average for 10 minutes and their willingness to pay goes down as well against reaching distance to the parking lots from 310 KRW for 50m, 297 KRW for 100m, 272 KRW for 200m and 248 KRW for 300m. It is clearly appeared that people's willingness to pay goes higher as distance to reach the parking lots goes shorter.

Estimating Travel Frequency of Public Bikes in Seoul Considering Intermediate Stops (경유지를 고려한 서울시 공공자전거 통행발생량 추정 모형 개발)

  • Jonghan Park;Joonho Ko
    • The Journal of The Korea Institute of Intelligent Transport Systems
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    • v.22 no.3
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    • pp.1-19
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    • 2023
  • Bikes have recently emerged as an alternative to carbon neutrality. To understand the demand for public bikes, we endeavored to estimate travel frequency of public bike by considering the intermediate stops. Using the GPS trajectory data of 'Ttareungyi', a public bike service in Seoul, we identified a stay point and estimated travel frequency reflecting population, land use, and physical characteristics. Application of map matching and a stay point detection algorithm revealed that stay point appeared in about 12.1% of the total trips. Compared to a trip without stay point, the trip with stay point has a longer average travel distance and travel time and a higher occurrence rate during off-peak hours. According to visualization analysis, the stay points are mainly found in parks, leisure facilities, and business facilities. To consider the stay point, the unit of analysis was set as a hexagonal grid rather than the existing rental station base. Travel frequency considering the stay point were analyzed using the Zero-Inflated Negative Binomial (ZINB) model. Results of our analysis revealed that the travel frequency were higher in bike infrastructure where the safety of bike users was secured, such as 'Bikepath' and 'Bike and pedestrian path'. Also, public bikes play a role as first & last mile means of access to public transportation. The measure of travel frequency was also observed to increase in life and employment centers. Considering the results of this analysis, securing safety facilities and space for users should be given priority when planning any additional expansion of bike infrastructure. Moreover, there is a necessity to establish a plan to supply bike infrastructure facilities linked to public transportation, especially the subway.

Development of a Time-Based Railway Crossing Control System and Evaluation (철도건널목 정시간 제어방식 개발 밑 효과분석에 관한 연구)

  • Park Dongjoo;Oh Ju-Taek;Lee Sun-Ha;Jung Chun-Hee;Shin Seong-Hoon
    • Journal of the Korean Society for Railway
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    • v.8 no.2
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    • pp.145-154
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    • 2005
  • Traffic accidents at highway-rail crossing result in larger social and economic damages than the accidents at the typical highway intersections. The traditional control and warning systems of the highway-rail crossing have limitations in that 1) they do not recognize the differences of the trains' arrival times because they rely on the distance-based control system, rather than the time-based one, and 2) thereby they usually cause longer delays of vehicles and pedestrians at the highway-rail crossings. The objective of this study is to develop a time-based railroad crossing control system which takes into account the speed and expected arrival time of trains. using the spot speeds and acceleration rates of trains measured at three points, the developed system was found to be able to accurately estimate the arrival time of train. VISSIM simulation package was utilized to compare system effect of the developed time-based railroad crossing control system with that of the conventional distance-based one. It was found that the developed time-based railroad crossing control system reduced the average travel time, maximum delay length, average delay time, and average number of stop-experienced vehicles as much as 7.0$\%$, 75.6$\%$, 12.7$\%$, and 60.0$\%$, respectively, compared with those from the conventional distance-based one.

An Analysis of Safety Impacts of Variable Message Signage as Functions of Road Curve Radius (도로곡선반경에 따른 가변전광표지의 교통안전효과 분석)

  • Lee, Sang Hyuk;Cho, Hye-Jin
    • International Journal of Highway Engineering
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    • v.17 no.5
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    • pp.47-56
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    • 2015
  • PURPOSES: The purpose of this study is to estimate the impact of variable message signage (VMS) on traffic safety as a function of road curve radius using statistical methods. METHODS: In order to analyze the impact of VMS installations on traffic safety, travel speed, lateral distance, and geometric data relating to road curvature in each study area was acquired and analyzed for the impact of providing VMS information on driver performance and traffic safety using statistical methods including student t-test, Mann-Whitney test, and the Anderson-Darling test for estimating traffic safety hazard zone in each lane. RESULTS: As a result of analyzing driver performance characteristics before and after providing VMS information, it was determined that by providing VMS information, mean travel speed is deceased and vehicles are driven with increased precision, following the centerline in the first and second lanes. Also the results of analyzing traffic safety impacts of VMS indicate that traffic safety performance factors in the first lane of the Gapyeong section can, on average, increase in the left and right side of the lane by 19.22% and 68.98%, respectively, and in the case of the second lane, safety impacts, on average, can increase in both sides by 100%. For the Hongcheon section, traffic safety impacts in the first lane, on average, can increase along the left and right sides of the lane by 32.31% and 47.18%, and within the second lane, traffic safety can be increased along the left and right side of the lane by 10.97% and -0.01%, respectively. CONCLUSIONS: Based on the results of this study, the impact on traffic safety obtained by providing VMS information for road sections with smaller curve radii is greater than can be obtained for road sections with larger curve radii.

Development of an Autonomous Worker-Following Transport Vehicle ( II ) - Supplementation of driving control system and field experiment - (농작업자 자동 추종 운반차 개발(II) - 주행제어시스템 보완 및 포장성능시험 -)

  • 권기영;정성림;강창호;손재룡;한길수;정석현;장익주
    • Journal of Biosystems Engineering
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    • v.27 no.5
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    • pp.417-424
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    • 2002
  • This study was conducted to develop a vehicle, leading or following a worker at a certain distance to assist laborious transporting works in greenhouses. A prototype vehicle was tested in the practical field conditions using a developed control algorithm. Results of this study were summarized as following: 1. The sensing device consisted of infrared sensors was attached to the front of the vehicle and turning following algorithm was developed to make the vehicle turned as it follows a worker simultaneously. 2. The measured average power consumptions were 110W and 89W, equivalent to 5.2-6.4 hrs battery durations, at low speed with and without the maximum payload, respectively. 3. Results of the travel tests showed that the deviations from the center of row spacing were $\pm$100 mm along the ridge and $\pm$85 mm along the hydroponic bed in the greenhouse. Therefore, the worker-following transport vehicle was feasible to travel along the row without collision in the greenhouse.

Analysis of Physical Characteristics Affecting the Usage of Public Bike in Seoul, Korea - Focused on the Different Influences of Factors by Distance to Bike Station- (서울시 공공자전거 이용에 영향을 미치는 물리적 환경 요인 분석 -대여소별 거리에 따른 요인의 영향력 차이를 중심으로-)

  • Sa, Kyungeun;Lee, Sugie
    • Journal of Korea Planning Association
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    • v.53 no.6
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    • pp.39-59
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    • 2018
  • This study examines the relationship between the usage of public bike and physical environment factors around the public bike stations using the public bike rental history data from 2016 to 2017 in Seoul, Korea. Focusing on the different influences of determinant factors by distance to public bike station, this study identifies influential factors that affect the usage of public bike. The results of the analysis are as follows. First, both the land use and physical environmental variables of bike station areas show strong associations with the usage of public bike. Second, the usage of public bike is also associated with neighborhood living facilities, business facilities, land use mix, the distance to subway station, public facilities and universities. This finding indicates that public bike has played a role as a transportation mode for the short-distance travel and commuting purposes in everyday life. Third, this study shows that the usage of public bike is strongly associated with the average slope, traffic volume around public bike stations, distance to streams or rivers, and the types of bike lane. This finding also indicates that surrounding environmental factors play an important role in the usage of public bike. Finally, this study identifies the different influences of determinant factors on the usage of public bike by distance to public bike station. This study suggests policy implications for the potential locations of public bike stations in the future.

Analysis of Public Transport Travel Behavior by using Transport Card Data (대중교통 card data를 이용한 통행행태 분석(지하철역 하차후 환승 버스 이용자 중심으로))

  • Kim, Dae-Seong;Eom, Jin-Ki;Moon, Dae-Seop;Choi, Myoung-Hun;Song, Ji-Young
    • Proceedings of the KSR Conference
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    • 2011.10a
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    • pp.443-452
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    • 2011
  • This study analyzed passenger travel patterns especially for the transfer from metro to bus by using transit smart card data. We classified three types of land use such as residential, business, and shopping area where metro stations are located. The results show that more number of transfers was observed at residential area compared to that of shopping and business area. Also, more number of transfers from metro to arterial bus was observed than that of transfers to local bus. Further, the high number of transfers to arterial bus was observed at business and shopping area. This means that the transfer to bus at metro stations varies by land use. The egress walk distance from metro station was found to be approximately 400 meters and the average walk distance of young people was found to be shorter than that of the old.

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Characteristics of Citizens' Access to Outdoor Exercise Places by Using the GIS - Focused on the Users of the Outdoor Exercise Equipment Installed in Parks, Seoul - (GIS를 이용한 도시민의 야외 운동장소 접근 특성 분석 - 서울시 공원의 운동기구 사용자를 중심으로 -)

  • Lee, Yeunsook;Gu, Naeun;Lee, Dongjoo
    • KIEAE Journal
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    • v.13 no.2
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    • pp.67-76
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    • 2013
  • The purpose of this study is to analyze the accessibility to the place for outdoor exercise. For that, the departure (resident) location of the users of outdoor exercise equipment within 12 parks in Seoul have been investigated. A total of 1,733 people have been surveyed during the two-week period between Aug.2 and Aug. 15 and 815 cases were analyzed. We also investigated demographic characteristics, access method and related factors such as location, climate and visiting time. The results were coded through ArcGis program and the accessibility to each exercise location, difference in regional accessibility and accessibility characteristics in terms of climate and time have been analyzed. The results are as follows: First, visitors to the Han River start from the places further than the visitors to the streamlines. Second, the average moving distance is longer for the users aged under-60 than for the users aged 60 and over to reach the exercise place. And the average moving distance for visitors to the Han River destination is the longest with 748 meters, followed by 203 meters for general parks and 92 meters for streamline parks, respectively. Third, in each non-waterfront parks, the moving distance by users under-60 was longer by about 230 meters than that by users 60 and over. Fourth, exercisers in the weekend travel more by 244 meters than those during the midweek users to reach the exercise place. Fifth, the number of visitors to the Han River increased in the weekend while visitors to the streamlines decreased in the same period. Sixth, the traveling length for bicycle users is three times as much as that for pedestrian visitors. And the departure locations of bicycle users were more widely distributed.

A Hybrid Genetic Algorithm for Vehicle Routing Problem which Considers Traffic Situations and Stochastic Demands (교통상황과 확률적 수요를 고려한 차량경로문제의 Hybrid 유전자 알고리즘)

  • Kim, Gi-Tae;Jeon, Geon-Uk
    • Journal of Korean Society of Transportation
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    • v.28 no.5
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    • pp.107-116
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    • 2010
  • The vehicle travel time between locations in a downtown is greatly influenced by both complex road conditions and traffic situation that changes real time according to various external variables. The customer's demands also stochastically change by time period. Most vehicle routing problems suggest a vehicle route considering travel distance, average vehicle speed, and deterministic demand; however, they do not consider the dynamic external environment, including items such as traffic conditions and stochastic demand. A realistic vehicle routing problem which considers traffic (smooth, delaying, and stagnating) and stochastic demands is suggested in this study. A mathematical programming model and hybrid genetic algorithm are suggested to minimize the total travel time. By comparing the results considering traffic and stochastic demands, the suggested algorithm gives a better solution than existing algorithms.

Relative relocation of Tadzhi kistan-Sin kiang events (타치키스탄 - 신강 지역 지진의 진앙에 대한 상대적 위치 결정)

  • 신진수;박창업
    • The Journal of Engineering Geology
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    • v.2 no.2
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    • pp.166-172
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    • 1992
  • Sixty Tadzhikistan-Sinkiang events occurred from the year 1966 to 1978 were relocated using relative location method with one reference event technique. Since the area covered by the events is about $300{\;}{\times}400{\;}km$, the region is subdivided into four. Each one has one reference event with accurate hypocenter location and travel time. The result shows average 0.3 change of distance.

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