• Title/Summary/Keyword: Road Traffic Facilities

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Characteristics of Roadside Non-point Pollution and Applicability of Reduction Facilities in Paldang Water Source Protection Zone (팔당 상수원 보호구역내 도로비점오염의 특성 및 저감시설의 적용성 연구)

  • Cho, Hye Jin;Song, Meeyoung
    • Ecology and Resilient Infrastructure
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    • v.7 no.4
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    • pp.294-299
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    • 2020
  • Based on the combined results of field surveys and analyses of the road structure and traffic flow, we propose a new plan for reducing roadside non-point pollution in the Paldang Water Source Protection Zone. The results show that the soil surrounding the roads in Paldang is highly permeable, which mitigates the need for filtration facilities. Roads flanked by steep slopes are found to facilitate the reduction of non-point roadside pollution through vegetation and soils along road slopes without the need for pollution reduction facilities. These results highlight the need for a flexible roadside non-point pollution reduction plan for roadside non-point pollution, which can be tailored to compliment relevant regulations and design standards after analyzing the characteristics of the target road.

Empirical Study of Simple Grade Facilities Gap Utilizing Micro Simulation Analysis (Micro Simulation을 활용한 도시부 단순입체시설 분합류 구간간격에 관한 실증연구)

  • Kim, Young-Il;Rho, Jeong-Hyun;Kim, Tae-Ho;Park, Jun-Tae
    • International Journal of Highway Engineering
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    • v.14 no.2
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    • pp.63-72
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    • 2012
  • Current analysis method drives an irrationality a road, signal operation and cause confusion of road such as weaving, bottleneck being not including main traffic flow in analysis subject. Therefore, this research develops analysis method of simple grade facilities to grasp target equipment relationship effect as virtue process to grasp effect of simple grade facilities in city and there is the purpose to apply optimum space of analysis intersection. In this paper, get at effect of simple grade facilities in urban area, as well as, develop new analysis method of simple grade facilities and adapt optimal interval of intersection point. New method of this paper reasonably estimated to optimal interval of the traffic flow(diverge area, merge area). As research result, analysis method to present in this research could clarify vague part of existing analysis method and presume reasonable result. Optimal interval of diverge and merge area with facilities was appeared more then 65m from the main line and more then 45m from the frontage road. Meaning of this paper as follow. First, the effect of simple grade facilities estimate. as consider optimal interval of simple grade facilities in urban can plan efficiently operation planning of road and signal in connection with nearby intersection. Second, new method then previous methods. planner of transportation easily access due to run parallel with existing method. Third, new method is contained through traffic volumes. the existing method did not reflect one. and this new method reduce error to the minimum. when analysis of intersection and link. Fourth, using the new method propose improvement plan with road operation and signal operation.

An Empirical Study on Development of Traffic Safety Facilities for Safe Autonomous Vehicle Operation in Construction Areas (자율주행자동차의 공사구간 안전주행 지원을 위한 교통안전시설물 개발 실증 연구)

  • Jiyoon Kim;Jisoo Kim
    • The Journal of The Korea Institute of Intelligent Transport Systems
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    • v.22 no.5
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    • pp.163-181
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    • 2023
  • Improving the detection performance of facilities corresponding to the sensors of autonomous vehicles helps driving safety. In the road and transportation field, research is being conducted to improve the detection performance of sensors by road infrastructure or facilities. As part of this on the development of autonomous driving support infrastructure, the shape of traffic cones and drums to ensure sufficient LiDAR detection performance even rainy conditions and maintain the line-of-sight guidance function in construction zones improvement effect. The principle was to increase reflection performance and ensure no significant difference in shape from existing facilities. Traffic cones were manufactured in square pyramid shapes instead of cones, and drums were manufactured in hexagonal and octagonal pillar shapes instead of cylinders. LiDAR detection data for the facility was confirmed on a clear day and with 20 mm/h and 40 mm/h rainfall. The detection performance of the square pyramid-shaped traffic cone and octagonal column-shaped drum was to the existing facility. On the other hand, deviations occurred due to repeated measurements, and significance could not be confirmed through statistical analysis. By reflecting these results, future studies will seek a form in which data can be obtained uniformly despite the diversity of measurement environments.

Development of BPR Functions with Truck Traffic Impacts for Network Assignment (노선배정시 트럭 교통량을 고려한 BPR 함수 개발)

  • Yun, Seong-Soon;Yun, Dae-Sic
    • Journal of Korean Society of Transportation
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    • v.22 no.4 s.75
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    • pp.117-134
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    • 2004
  • Truck traffic accounts for a substantial fraction of the traffic stream in many regions and is often the source of localized traffic congestion, potential parking and safety problems. Truck trips tend to be ignored or treated superficially in travel demand models. It reduces the effectiveness and accuracy of travel demand forecasting and may result in misguided transportation policy and project decisions. This paper presents the development of speed-flow relationships with truck impacts based on CORSIM simulation results in order to enhance travel demand model by incorporating truck trips. The traditional BPR(Bureau of Public Road) function representing the speed-flow relationships for roadway facilities is modified to specifically include the impacts of truck traffics. A number of new speed-flow functions have been developed based on CORSIM simulation results for freeways and urban arterials.

A Safety Evaluation of Shoulder Rumble Strips on Freeway Using C-G Method (C-G Method를 이용한 고속도로 노면요철 포장의 교통사고감소 효과분석)

  • Lee, Dong-Min;Kang, Jae-Hong;Sung, Nak-Moon;Chung, Bong-Jo
    • International Journal of Highway Engineering
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    • v.9 no.2 s.32
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    • pp.77-87
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    • 2007
  • Traffic accidents on freeway are occurred by various factors, and driver inattention is one of the most important factors causing traffic accidents. To warn drivers about unexpected dangerous events and diminish driver inattention problems, traffic safety facilities including warning and regulatory traffic signs; delineators; rumble strips are installed. In this study, the traffic safety effect of shoulder rumble sips were investigated using "Comparison Croup (C-G)" method developed by Hauer. Through the analyses, it was found that numbers of run-off-the road crashes were reduced as 2.43 crashes per year after the installation of shoulder rumble strips on the freeway. Based on the analysis results in this study, it was concluded that shoulder rumble strips on the freeway contribute to reduce traffic accidents, especially run-off-the road crashes.

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A Study on the Installation of a Barrier to Prevent Large-Scale Traffic Accidents in Tunnel

  • Baek, Se-Ryong;Yoon, Jun-Kyu;Lim, Jong-Han
    • International journal of advanced smart convergence
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    • v.8 no.4
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    • pp.161-168
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    • 2019
  • Traffic accidents in tunnel can lead to large traffic accidents due to narrow and dark road characteristics. Therefore, special care of the driver is required when is driving in a tunnel. However, accidents can happen at any time. In the event of an accident, a narrow road structure may lead to a second accident. Therefore, all facilities installed inside the tunnel should be allowed to minimize damage in the event of an accident. We confirmed the safety of the collision target through the action of the sedan, Sport Utility Vehicle (SUV) and truck when the vehicle crashed into a stairway installed on the tunnel emergency escape route, and when a concrete barrier or guard rail was installed in front of the stairway. The behavior of the vehicle has resulted in a total of three results: rollover or rollover, change of speed and angle of the vehicle after collision. The sedan and SUV were the most secure when colliding with the guardrail, but considering the truck as a whole, concrete barriers were judged to be the most suitable for minimizing damage from the first accident and reducing the risk of the second accident.

Air Pollutant Emission Characteristics of a Light Duty Diesel Vehicle Affected by Road Infrastructure Improvement and Traffic flow Changes (도로 기반시설 개선과 교통흐름 변화에 따른 소형 경유자동차의 대기오염물질 배출특성)

  • keel, Jihoon;Lee, Taewoo;Lee, Sangeun;Jung, Sungwoon;Yun, Boseop;Kim, Jeongsoo;Choi, Kwangho
    • Journal of ILASS-Korea
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    • v.21 no.4
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    • pp.214-222
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    • 2016
  • Changes in road infrastructure affect driving patterns and pollutant emission characteristics. we analyzed the changes in driving patterns and pollutant emission characteristics of the driving route via measured driving patterns at year 2009 and 2016. Since 2009, there has been an increase in population and traffic demand, including residential areas and industrial facilities. Traffic conditions were improved such as the opening of the highway Inter-Change to Seoul and the construction of underground driveway. As a result, the average vehicle speed increased. More detail comparisons have made on the changes of the underground driveway section and the crossroad section, which are expected to have significant changes in the transportation infrastructure. The vehicle speed distribution of the underground driveway changed from low speed to high speed, and the increase of the time spent at the high speed and high load caused the increase of NOx emissions. The vehicle speed also increased at the crossroad section, and the consequence NOx and $CO_2$ emissions decreased. It is mainly because the decreased time spent at idle, which results from the proper traffic demand management at this area.

Measures against Damages from Heavy Snow (눈 피해 대비책)

  • Park, Moo-Il
    • Journal of the Korean Professional Engineers Association
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    • v.39 no.1
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    • pp.54-57
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    • 2006
  • The snow brings affluence if it is dealt with appropriately. but causes huge damages if it is dealt with improperly when it snows heavily. Following with the development of road transportation, tile snow causes damages by becoming a serious obstacle for traffic, increasing traffic accidents, causing damages to the road, and requiring a lot of snow removal expense. As farming in the winter becomes flourishing, damages to agricultural facilities and farm produces caused by the snow become bigger and bigger. Now in our country, heavy snow or heavy rain is likely to fall at anywhere and at any time without restricted to a particular area. Safety first is one way of practicing human respect. Disasters will disappear from our neighborhood if we adopt prevention measures and follow them thoroughly. And also this is the shortcut to achieve a welfare society.

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A Study on Safe School Zone System using LabVIEW

  • Kim, Kyung-Hwa;Shim, Joon-Hwan
    • Journal of Engineering Education Research
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    • v.13 no.5
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    • pp.20-24
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    • 2010
  • The total number of deaths by traffic accidents is decreasing every year in our country. However, in 2009, children died in traffic accidents at a rate of 2.3 deaths per 100,000 children, which was higher than the average of OECD countries (1.9 deaths per 100,000 children). In particular, traffic accidents are showing rapid increase in school zone during the past 2 years because of problems in the designation and management of school zone. Traffic safety facilities such as road sign, reflector mirror, speed bump have the ultimate limit of vehicle accidents prevention. Thus, in school zone, children safety is still not guaranteed due to illegal parking and the absence of driver's awareness of safety. Therefore, In order to protect children from traffic accidents within school zones, we have realized a safe school zone system, which enables the drivers to better know the intended school zones and creates pedestrian environment through unmanned monitoring camera, using LabVIEW.

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Calculation of Road Circuity Factors Considering Public Facilities and Road Condition in Rural Area (농촌지역의 공공시설 및 도로 상황을 반영한 도로 우회계수 산정)

  • Jeon, Jeongbae;Park, Meejeong;Yoon, Seongsoo;Suh, Kyo;Kim, Eunja
    • Journal of Korean Society of Rural Planning
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    • v.23 no.2
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    • pp.55-65
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    • 2017
  • This study is to estimate the circuity factors which can be used to assess for public facilities accessibility and analyze traffic in the area. We set the range of the administrative districts by Si Gun Gu unit and Eup Myeon Dong unit (more subdivided unit than Si Gun Gu unit). The average circuity factor in Si Gun Gu unit is 1.364 (maximum 2.953 and minimum 1.711). The region indicated the highest value of circuity factor is wando-gun in jeollanam-do, which area consists of 4 island and is connected to the bridges. Having to use the bridges for using public facilities hinders its accessibility. In the case of Eup Myeon Dong unit, the average circuity factor is 1.353 (maximum 2.950 and minimum 1.154). The region indicated the highest value of circuity factor is buksan-myeon in chuncheon-si, Gangwon-do. This region also has to use bridges for using public facilities because there is the largest lake, called Soyangho. This circuity factor is used to analyze the location of public facilities and assess vulnerability of accessibility. And also the factor can be applied to some policies, such as rural public service planning based on spatial big data.