Determination of Passenger Car Equivalents When Estimating Capacity at Small 3-leg Roundabouts

소형 삼지 회전교차로의 용량분석을 위한 승용차 환산계수에 관한 연구

  • Received : 2010.08.12
  • Accepted : 2010.12.15
  • Published : 2010.12.31

Abstract

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.

이 연구는 다양한 차종의 차량이 혼합되어 운영되는 소형 3지 회전교차로에서 용량과 지체를 산정할 때 고려될 수 있는 새로운 형태의 승용차 환산계수의 모형과 이를 이용한 보정계수의 개발에 관한 것이다. 연구를 위하여 현재 회전교차로의 효과척도로 사용되고 있는 제어지체(Control Delay)를 기반으로 한 산정모형을 개발하고 현장에서 직접 수집한 실험자료를 적용하여 결과를 도출하고, 이를 이용재 외(2001)에서 제의한 모형의 결과와 비교 분석한다. 신호 교차로와는 달리, 회전교차로에서는 아직 중차량에 대한 영향을 객관적으로 감안할 수 있는 승용차 환산계수의 모형이 아직 제시되고 있지 않다. 두 가지 접근법에 의한 분석의 결과는 상호 높은 상관성을 보이고 있으며, 외국의 다른 연구결과와도 유사한 결과를 보이고 있어 향후 이 분야의 연구에 도움을 줄 것으로 판단된다.

Keywords

References

  1. 이용재.김석근(2001), "비신호 교차로의 중차량 용량 보정계수에 관한 연구", 대한교통학회지, 제19권 제2호, 대한교통학회, pp.89-98.
  2. Highway Research Board(1965), "Highway Capacity Manual". Special Report 87, Washington D.C., 1966.
  3. Benekohal, R. F., and W. Zhao(2000), "Delay-Based Passenger Car Equivalents for Trucks at Signalized Intersections", Transportation Research Part A: Policy and Practice, Vol. 34, No.
  4. Branston, D., Gipps, P.(1981), "Some experience with a multiple linear regression method of estimating parameters of the traffic signal departure process", Transportation Research 15, pp.445-458. https://doi.org/10.1016/0191-2607(81)90112-6
  5. Branston, D., van Zuylen, H.(1978), "The Estimation of saturation flow, effective green time and passenger car equivalents at traffic signals by multiple linear regression", Transportation Research 12, pp.47-53. https://doi.org/10.1016/0041-1647(78)90107-7
  6. Catchpole, E.A., Plank, A. W. (1986), "The Capacity of Priority Intersection", Transportation Research 20B(6), pp.441-456.
  7. Craus, J., A. Polus, and I. Grinberg(1980), "Revised Method for the Determination of Passenger Car Equivalencies", Transportation Research, Vol. 14A, pp.241-246.
  8. Evans, L., Rothery, R.(1981), "Influence of vehicles size and performance on intersection saturation flow", Proceedings of the Eighth International Symposium on Transportation and Traffic Theory.
  9. Greenshields, B. D., D. Shapiro, and E. L. Erickson(1947). "Traffic Performance at Urban Intersection", Bureau of Highway Traffic, Yale University, New Haven, Connecticut.
  10. Keller, E. L., and J. G. Saklas(1984), "Passenger Car Equivalents from Network Simulation", Journal of Transportation Engineering, Vol. 110, No. 4, pp.397-411. https://doi.org/10.1061/(ASCE)0733-947X(1984)110:4(397)
  11. Keller, E.L.(1984), "Passenger car equivalents from network simulation", ASCE Journal of Transportation Engineering 110, July.
  12. Kimber, R.M.(1985), "Passenger car units in saturation Flows: concept, definition, derivation", Transportation Research B 19, pp.39-61. https://doi.org/10.1016/0191-2615(85)90028-1
  13. Krammes, R. A., and K. W. Crowley(1986), "Passenger Car Equivalents for Trucks on Level Freeway Segments", In Transportation Research Record: Journal of the Transportation Research Board, No. 1091, TRB, National Research Council, Washington, D.C., pp.10-17.
  14. Linzer, E., R. Roess, and W. McShane(1979), "Effect of Trucks, Buses, and Recreational Vehicles on Freeway Capacity and Service Volume", In Transportation Research Record: Journal of the Transportation Research Board, No. 669, TRB, National Research Council, Washington, D.C., pp.17-26.
  15. Molina, C. J.(1987), "Development of Passenger Car Equivalents For Large Trucks at Signalized Intersections", ITE Journal, Vol. 57, No. 11, pp.33-37.
  16. Sumner, R, D. Hill, and S. Shapiro(1984). "Segment Passenger Car Equivalent Values for Cost allocation on urban arterial roads", Transportation Research A 18, pp.399-406. https://doi.org/10.1016/0191-2607(84)90014-1
  17. Transportation Research Board(2000), "Highway Capacity Manual", Special Report 209, Third Edition. Transportation Research Board, National Research Council: Washington, D.C.
  18. Troutbeck, R.J.(1988), "Current and Future Australian Practices for the Design of Unsignalized Intersections", Intersections Without Traffic Signals. Edited by W. Brilon. New York, NY: Springer-Verlag, pp.1-19.
  19. Troutbeck, R.J.(1992), "Estimating the Critical Acceptance Gap from Traffic Movements", Research Report 92-5. Qeensland University of Technology, Brisbane.
  20. Van Aerde, M., and S. Yagar(1984), "Capacity, Speed, and Platooning Vehicle Equivalents for Two-Lane Rural Highways", In Transportation Research Record: Journal of the
  21. Webster, F.V.(1958), "A Controlled experiment on the capacity of junctions with traffic signals", Road Research Lab. Res. Note No. RN/3313/FVW. BR 587.
  22. Webster, F.V., Cobbe, B.M.(1966), "Traffic Signals", Road Research Technical Paper No. 56, HMSO, London.
  23. Webster, N., and L. Elefteriadou(1999), "A simulation study of truck passenger car equivalents (PCE) on basic freeway sections", Transportation Research Part B:Methodological, Vol. 33, No. 5, pp.323-336. https://doi.org/10.1016/S0965-8564(98)00036-6
  24. West, J.E., Thurgood, G.S.(1995), "Developing passenger car equivalents for left-turning trucks at compressed diamond interchanges", Presented at the 74th TRB annual meeting,
  25. Wu, Ning (2006), "A New Model for Estimating Critical Gap and Its Distribution at Unsignalized Intersections Based on the Equilibrium of Probabilities", In: Proceeding of the 5th International Symposium on Highway Capacity and Quality of Service. Yokohama, Japan, July 25-29.