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Effect of encroaching vehicles on capacity of signalized intersections in mixed traffic conditions



This paper estimates capacity of signalized intersections in heterogeneous traffic conditions considering the effect of encroaching vehicles. Accurate estimation of capacity of signalized intersections plays vital role in evaluating performance of whole road network. In the present paper two sets of saturation flow values are estimated separately by considering and not considering the effect of encroaching vehicles. Also, the capacity of the signalized intersections is found considering the effect of encroaching vehicles. For this purpose, five signalized intersections are selected from four different cities in India: Bachupally, Thondayad, Eranhipalam, Adalath and Gurunanakdwar intersections. The estimated saturation flow and capacity showed significance variation due to the presence of encroaching vehicles. The capacity estimated considering encroaching vehicles is higher than that estimated without considering encroaching vehicles.

Keywords: capacity, encroaching vehicles, heterogeneous traffic, saturation flow, signalized intersection


Cite this Article: Ramireddy Sushmitha, K.V.R. Ravishankar. Effect
of Encroaching Vehicles on Capacity of Signalized Intersections in
Heterogeneous Traffic Conditions. International Journal of
Transportation Engineering and Traffic System. 2020; 6(1): 1–8p.

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Indian Highway Capacity manual (INDO HCM), (2017). Council of Scientific and Industrial Research (CSIR), New Delhi.

Farivar, S., Andalibian, R., Tian, Z.Z. (2017). “Modeling Right-Turn Blockage and Approach Capacity at Signalized Intersections with Channelized Right-Turn Lanes”, Journal of transportation engineering, Part A, ASCE, 143(2).

Chand. S.,Gupta. N.J., Velmurugan. S. (2016). "Development of saturation flow model at signalized intersection for heterogeneous traffic". World Conference on Transport Research, Shanghai.

Mavani. A.J., Patel. H.B., Shah. P.M., Varia.H.R. (2016). "Saturation Flow Rate Measurement on a Four Arm Signalized Intersection of Ahmedabad City". International Journal of Engineering Research & Technology (IJERT). Vol. 5 Issue 03, March-2016.

Zhao, J., Li, P., Zhou, X. (2016). “Capacity Estimation Model for Signalized Intersections under the Impact of Access Point”. PLOS.

Yi, Z., Zhang, W., Lu,J., Zhang, W., Ma, Y. (2015). “Estimation of Saturation Flow Rate and Start-Up Lost Time for Signal Timing Based on Headway Distribution”. Hindawi Publishing Corporation, Discrete Dynamics in Nature and Society, Volume 2015, Article ID 304823.

Shang. H., Zhang.Y., Fan.L. (2014). "Heterogeneous Lanes’ Saturation Flow Rates at Signalized Intersections". The 9th International Conference on Traffic & Transportation Studies (ICTTS’2014).

Fornalchyk. Y., Mohyla. I., Hilevych, V.(2013). "The saturation flow volume as a function of the intersection passing speed". Transport Problems. Volume 8, Issue 3.

Highway Capacity Manual (HCM), Transportation Research Board, (2010).

Tian, Z., and F. Xu.(2006). “Modeling the Effects of Pedestrians on Intersection Capacity and Delay with Actuated Signal Control. Proc., 5th International Symposium on Highway Capacity”, Yokohama, Japan, July 2006.

Kockelman. K.M., Shabih. R.A. (2000). "Effect of vehicle type on the capacity of signalized intersections: The Case of Light-Duty Trucks". Journal of Transportation Engineering.



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