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On the reserve capacities of priority junctions and roundabouts

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  • Wong, S. C.

Abstract

The concept of reverse capacity of a whole junction has been used extensively in the design of signal-controlled junctions. This concept, however, has not been applied to priority junctions and roundabouts, probably because of the complicated demand and supply relationship. When the demands on the approaches to the junction increase, the capacities of those non-priority approaches reduce at different rates. This makes the calculation of reserve capacity of the whole junction not a straightforward task. Using the definition of reserve capacity of a whole junction in Allsop (1972; Transpn Res. 6, 245-255), explicit formulae for the estimation of reserve capacities of priority junctions and roundabouts are derived in this paper. Numerical examples are given to illustrate the usefulness of these formulae.

Suggested Citation

  • Wong, S. C., 1996. "On the reserve capacities of priority junctions and roundabouts," Transportation Research Part B: Methodological, Elsevier, vol. 30(6), pages 441-453, December.
    • Handle: RePEc:eee:transb:v:30:y:1996:i:6:p:441-453
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    Cited by:

    1. Zheng, Yu & Zhang, Xiaoning & Liang, Zhe, 2020. "Multimodal subsidy design for network capacity flexibility optimization," Transportation Research Part A: Policy and Practice, Elsevier, vol. 140(C), pages 16-35.
    2. Wong, C.K. & Heydecker, B.G., 2011. "Optimal allocation of turns to lanes at an isolated signal-controlled junction," Transportation Research Part B: Methodological, Elsevier, vol. 45(4), pages 667-681, May.
    3. Khooban, Zohreh & Farahani, Reza Zanjirani & Miandoabchi, Elnaz & Szeto, W.Y., 2015. "Mixed network design using hybrid scatter search," European Journal of Operational Research, Elsevier, vol. 247(3), pages 699-710.
    4. Song, Yang & Hu, Xianbiao & Lu, Jiawei & Zhou, Xuesong, 2022. "Analytical approximation and calibration of roundabout capacity: A merging state transition-based modeling approach," Transportation Research Part B: Methodological, Elsevier, vol. 163(C), pages 232-257.
    5. Wong, C. K. & Wong, S. C., 2003. "Lane-based optimization of signal timings for isolated junctions," Transportation Research Part B: Methodological, Elsevier, vol. 37(1), pages 63-84, January.

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