Journal of Korean Society of Transportation (대한교통학회지)

Korean Society of Transportation (대한교통학회)
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Development of BPR Functions with Truck Traffic Impacts for Network Assignment

노선배정시 트럭 교통량을 고려한 BPR 함수 개발

  • Published : 2004.08.31
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Abstract

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.

도로교통량의 상당부분을 차지하는 트럭교통(truck traffic)은 교통혼잡, 주차, 교통안전 문제의 큰 요인이 되고 있다. 그러나 그 동안 교통수요예측 및 교통계획에서 트럭교통은 사람교통(passenger trip)에 비해 상대적으로 그 중요성이 간과되어 왔다. 트럭교통의 정확한 모형화가 선행되지 않으면 각종 교통수요예측 및 교통정책의 신뢰성은 낮아질 것이다. 본 연구의 목적은 교통수요예측 과정에서 트럭교통을 교통망(network)에 배정하는 기법을 개선하는데 있다. 이를 위해 본 연구에서는 노선배정(network assignment)의 핵심적인 요소인 기존의 BPR(Bureau of Public Road) 함수에 트럭 교통량 변수를 포함하여, 수정된 새로운 BPR 함수를 개발하였다. 본 연구에서 제시된 방법은 교통수요예측시 트럭 교통량을 고려하여 보다 현실적이고 신뢰성 있는 도로교통수요 예측치를 담보할 수 있을 것으로 기대된다.

Keywords

References

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