• Journal of Korean Society of Transportation
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• v.16 no.4
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• pp.113-126
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• 1998

본 논문에서는 1992년 KHCM 작성시 이용된 양방향 2차선 도로 및 고속도로의 승용차 환산계수 산정방법론 및 자료를 연구하였다. 대형차가 2차선도로, 고속도로의 교통류에 미치는 영향은 각기 다르므로 1992년 KHCM 작성시 승용차 환산계수를 산정하는데 있어서 각 도로의 특성을 최대한 반영하기 위해 다양한 방법을 적용하였다. 양방향 2차선 도로의 평지의 서비스 수준 A에서는 Walder 방법, 서비스 수준 B, C, D에서는 지체시간 방법, 서비스 수준 E에서는 차두간격 방법, 구릉지, 산지 특정구배에서는 실측 자료 및 TWOPASKI Simulation에 의한 방법을 적용하였고, 고속도로의 평지에서는 차두간격 방법, 그릉지, 산지, 특정구배에서는 실측 자료 및 VEHEQ Simulation에 의한 방법을 적용하였다. 양방향 2차선 도로는 한 방향당 차선이 하나이므로 추월시 대형차의 영향이 고속도로보다 크기 때문에 각 서비스 수준별고 승용차 환산계수를 제시했으며, 고속도로의 승용차 환산계수는 용량에 가까운 상태에서의 승용차환산계수를 제시하였다. 본 논문은 1992년 KHCM의 양방향 2차선 도로 및 고속도로의 승용차 환산계수 산정에 실지로 적용된 방법론 및 자료를 수정없이 그대로 제시하여 독자들이 승용차 환산계수 산정에 이용된 자료의 양 및 연구 수준의 정도를 이해할 수 있게 하고 독자의 평가를 통하여 미비한 부분은 추후 개정 작업에 반영하기 위함이다.

• The Journal of The Korea Institute of Intelligent Transport Systems
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• v.14 no.4
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• pp.52-61
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• 2015

PCE(Passenger Car Equivalents) is used to analysis of road capacity and LOS(Level of Service). In this study calculates PCE by number of lane and 12 vehicle type by MOLIT(Minister of Land, Infra Structure and Transport) using individual vehicle data. The results of the calculation, PCEs are increased when high vehicle classification level, many number of lanes and weekend. Heavy vehicle factors are smaller than KHCM on 4, 6 lane. Also, In this study estimates of PCE variation model by heavy vehicle percentage. Impact of Heavy vehicles on PCEs is the most sensitive on 2 lane. The results of the study, heavy vehicles low impact on PCE on multi-lane and business trips are a little in weekend.

• Journal of Navigation and Port Research
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• v.31 no.1 s.117
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• pp.107-113
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• 2007

This research addressed the problem of describing how the operating characteristics of passenger car and large vehicle differ qualitatively and quantitatively through the analysis of field survey data. A formulation that estimates passenger car equivalents used in this paper is derived by microscopic headway method. Regression analysis was used to focus on the effect of vehicle type on intervehicular spacings and the modeling technique for the statistical analysis was detailed.

• Journal of Korean Society of Transportation
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• v.28 no.6
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• pp.65-74
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• 2010

This study aims at developing a method for estimating passenger car equivalency (PCE) values for various vehicle types that could be considered in estimating capacity and delay at intersections without traffic signals, especially at modern small 3-leg roundabouts. Unlike signalized intersections, the PCE value has not yet been treated explicitly in traffic operations involving unsignalized intersections. Both empirical and theoretical approaches for determining the PCE values at modern small 3-leg roundabouts were evaluated. As a result, the PCEs derived in this study were highly correlated with those of field measurements.

• Journal of Korean Society of Transportation
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• v.17 no.2
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• pp.149-162
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• 1999

One of the most important steps of the design, capacity and operation analysis stapes in the two-lane two way highways is the effect of heavy vehicle to traffic flow quality. This heavy vehicle's effect on traffic flow can be represented as PCE, which is the number of passenger cars that are displaced by a single heavy vehicle of a particular type under prevailing roadway, traffic, and control conditions. In this paper, we focus on the heavy vehicles effect on volume, speed, delay, and the maneuver of freedom which are major MOE's in traffic operation analysis and PCE criterion which should be measurable, determinable and able to reflect the traffic flow characteristics. Therefore, the objective of the paper is to determine the PCE criterion and to develop a new PCE determination method. In this study, delay is adopted as PCE criterion and, for calculation of delay, the highway is divided into the passing zone and the no-passing zone. PCE is determined by comparing the delay due to total traffic flow interaction with the delay due to a single heavy vehicle, Also, this paper proposes a new method to determine the average PCE on the highway that has the passing zones and no-passing zones.

• Journal of Korean Society of Transportation
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• v.8 no.2
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• pp.99-107
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• 1990

This research addresses the effect of heavy vehicles (especially trucks) in terms of passenger car Equivalents from a capacity viewpoint. A formulation that estimate PCE in this paper is derived by introducing appropriate headway measurements into Huber's general equation for PCEs. In this equation, PCE value is expressed in terms of headways for four different kinds of pairs; pairs of leading and following vehicles ; P-P, P-T, P-T, T-T. The mean value of headway for each case is estimated through the regression analysis. Finally, the approach used in this research was compared with macroscopic approach which analyzed a speed-density relationship to evaluate PCE.

• Journal of Korean Society of Transportation
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• v.16 no.2
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• pp.9-22
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• 1998

본 연구는 U턴 효율적 운영에 필요한 기초자료 즉, U턴 이동류에 대한 차두시간, 출발손실시간, 승용차 환산계수 그리고 포화교통류율을 산정하였다. 또한 다중 U턴 횟수, U턴 허용 길이별 U턴 용량 특성을 분석하였다. 연구결과를 보면, U턴 평균 차두시간은 2.43초이고 이에 따른 포화교통율은 1,480(pcph)로 분석되었다. 출발손실은 두 번째 차량까지 손실이 있어 1.57초로 산정 되었다. 승용차 환산계수는 대형차 혼입율에 따라 1.98에서 1.35사이에 분포하며 평균값은 1.78이다. 그리고 주기당 다중 U턴 횟수가 많을수록 포화교통류율이 커졌으며 횟수가 1회, 2회 및 3회일 때 포화교통류율이 각각 1,600, 1,650 및 1,800pcph로 나타났다. U턴 허용 길이가 늘어나면 포화교통류율이 늘어나며 18m, 21m 및 30m로 증가될 때 1,570, 1,610, 및 1,640pcph로 증가하는 것이로 분석되었다.

• Proceedings of the KOR-KST Conference
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• 1999.10a
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• pp.297-302
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• 1999

• Journal of the Korean Institute of Intelligent Systems
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• v.6 no.3
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• pp.51-62
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• 1996

Electro sensitive traffic system can not consider passenger car unit, so it causes start up delay time and passenger waiting time. In this paper, it antecedently creates passenger car unit at the bottom intersection using neural network. But, sometimes it can make mistakes due to changes in car weight, car speed, and passing area. Therefore, it consequently reduces the car waiting time and start-up delay time using fuzzy control of feed-back data. Moreover, to prevent spillback, it can adapt control even though upper traffic intersection has a different saturation rate, road length, road slope and road width.

• 한국ITS학회:학술대회논문집
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• 2003.11a
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• pp.21-28
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• 2003