• 제목/요약/키워드: Korea Highway

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The analysis of two-lane highway traffic flows in case of the neighborhood electric vehicle involved (2차로도로에서 저속전기자동차 혼입에 따른 교통류 특성분석)

  • Jang, Keun-Woo;Jung, Sung-Hwa;Cho, Ju-Myung;Jung, Phil-Hyun
    • The Journal of The Korea Institute of Intelligent Transport Systems
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    • 제10권5호
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    • pp.124-134
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    • 2011

  • To make popular the NEV(Neighborhood Electric Vehicles) uses, it must be considered the supply of infrastructure and the political decision for NEV. However, the guidelines of infrastructure for NEV are not prepared. The guidelines of infrastructure for NEV should be performed in many research and case. The purpose of this study is to reveal the influence of NEV on the two-lane highway traffic flows by TWOPAS simulation model. The main items to check the influence are Average Travel speed, Percent Time Spent Following and Total Delay. The scenario were setup by traffic volume. And the NEV percentages are changed from 1% ~ 30%. The scenario 1 which traffic volume are 650veh/h and the scenario 4 which traffic volume are 2,600veh/h are less influenced by NEV, compare to scenario 2, scenario 3. Because the scenario 1 is more free to make passing other cars and Scenario 4 is fully saturated with existing traffic volumes. The urban two-lane highway which has much traffic volume and the rural two-lane highway which has little traffic volume has affinity for NEV than the other two-lane highway.

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Evaluation of Travel Time Prediction Reliability on Highway Using DSRC Data (DSRC 기반 고속도로 통행 소요시간 예측정보 신뢰성 평가)

  • Han, Daechul;Kim, Joohyon;Kim, Seoungbum
    • The Journal of The Korea Institute of Intelligent Transport Systems
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    • 제17권4호
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    • pp.86-98
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    • 2018

  • Since 2015, the Korea Expressway Corporation has provided predicted travel time information, which is reproduced from DSRC systems over the extended expressway network in Korea. When it is open for public information, it helps travelers decide optimal routes while minimizing traffic congestions and travel cost. Although, sutiable evaluations to investigate the reliability of travel time forecast information have not been conducted so far. First of all, this study seeks to find out a measure of effectiveness to evaluate the reliability of travel time forecast via various literatures. Secondly, using the performance measurement, this study evaluates concurrent travel time forecast information in highway quantitatively and examines the forecast error by exploratory data analysis. It appears that most of highway lines provided reliable forecast information. However, we found significant over/under-forecast on a few links within several long lines and it turns out that such minor errors reduce overall reliability in travel time forecast of the corresponding highway lines. This study would help to build a priority for quality control of the travel time forecast information system, and highlight the importance of performing periodic and sustainable management for travel time forecast information.

  • https://doi.org/10.12815/kits.2018.17.4.86 인용 PDF KSCI