The Journal of The Korea Institute of Intelligent Transport Systems (한국ITS학회 논문지)

The Korea Institute of Intelligent Transport Systems (한국ITS학회)
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An Analysis of Change in Traffic Characteristics with Fog

안개 발생에 따른 교통 특성 변화 분석

  • Kim, Soullam (Korea Institute of Civil Engineering and Building Technology) ;
  • Lim, Sung Han (Korea Institute of Civil Engineering and Building Technology)
  • Received : 2017.06.09
  • Accepted : 2017.08.23
  • Published : 2017.08.31
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Abstract

The adverse weather is known as a factor that interrupts traffic flow and causes traffic accidents and traffic congestion by lowering visibility of drivers. Especially, in case of fog unlike any other weather conditions, traffic accidents lead to serious accidents and the fatality of the accidents is known to be high. This paper aims to analyze uninterrupted traffic flow characteristics under foggy conditions among adverse weathers. The traffic volumes and speeds under foggy and normal conditions were analyzed. Results indicated that fog with low visibility causes the most insignificant reduction in traffic volumes. On the other hand, the reduction in the speeds due to low visibility was evident. In addition, the relationship between flow, speed, and density in fog were analyzed. Analysis results showed that the fog with less than 200m visibility had clear impact on traffic flow.

기상 악화 시 운전자의 시인성이 저하되어 교통 흐름에 영향을 미치며 이는 교통 정체나 교통사고를 유발시킨다. 특히, 안개가 발생할 경우 다른 기상 요인과는 달리 교통사고가 대형 교통사고로 이어지며 치사율도 높은 것으로 알려져 있다. 본 연구에서는 교통류에 영향을 미치는 가시거리 수준을 도출하기 위해 악천후 중 안개 발생 시 교통특성을 분석하였다. 연속류 도로를 대상으로 안개 발생 시와 미 발생 시의 교통량 및 속도 변화를 비교 분석하였으며, 가시거리 수준별 교통량-속도-밀도 관계를 분석하였다. 분석 결과, 동일시간대의 교통량 변화는 거의 없는 것으로 나타났으며 속도는 가시거리가 짧을수록 감소하는 것으로 나타났다. 또한, Q-U-K 관계에서 가시거리 200m 이하의 안개 발생 시 미 발생 시와 뚜렷한 차이를 보여 교통류에 영향을 미치는 것으로 분석되었다. 본 연구 결과를 기반으로 교통류에 영향을 미치는 가시거리 수준 판단이 가능하여 향후 안개 발생 시 제한 속도 제어, 교통량 제어 등 교통 운영 전략의 공학적 기초자료로 활용될 수 있을 것으로 기대된다.

Keywords

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Cited by

  1. Development of Risk Index of Uninterrupted Traffic Flow According to the Occurrence of Fog vol.06, pp.03, 2018, https://doi.org/10.4236/wjet.2018.63031