DYNAMIC PCU VALUES AT SIGNALISED INTERSECTIONS IN INDIA FOR MIXED TRAFFIC
5 / 2 / 197-209 Pages
Sheela Alex - College of Engineering, Trivandrum, India -
The traffic stream behaves differently in a mixed traffic condition as compared to that of a homogeneous condition. In a mixed traffic condition, as the traffic behaviour is always fluctuating based on the interaction caused by the surrounding elements, it is essential that the factors which affect the dynamic nature of the traffic characteristics should be considered for the proper design of the system. The paper highlights the methodology for developing the dynamic Passenger Car Unit (PCU) under various vehicular interactions for mixed traffic conditions prevalent in India. Experiments were carried out using the micro simulation model, TRAFFICSIM, which was developed for signalised intersections by the authors and reported elsewhere. The dynamic PCU values were obtained based on the analysis of the outputs of TRAFFICSIM, for varying approach width, traffic composition, stream speed and traffic volume. Modified area occupancy concept was used to develop Dynamic PCU values in a mixed traffic condition. In the modified area occupancy method, the area occupancy of the vehicle types for various traffic compositions is compared with area occupancy of the passenger cars in a car only traffic condition having the same stream speed. The study showed that the PCU values are highly sensitive to the given traffic conditions such as approach width, traffic composition, stream speed as well as flow ratio.
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Arasan, V.T.; Arkatkar, S.S. 2010. Microsimulation Study of Effect of Volume and Road Width on PCU of Vehicles Under Heterogeneous Traffic, Journal of Transportation Engineering, ASCE. DOI: http://dx.doi.org/10.1061/(ASCE)TE.1943-5436.0000176, 136(12): 1110-1119.
Arasan, V.T.; Jagadeesh, K. 1995. Effect of Heterogeneity of Traffic on Delay at Signalized Intersections, Journal of Transportation Engineering. DOI: http://dx.doi.org/10.1061/(ASCE)0733-947X(1995)121:5(397), 121(5): 397-404.
Arasan, V.T.; Krishnamurthy, K. 2008. Study of the Effect of Traffic Volume and Road Width on PCU Values of Vehicles Using Microscopic Simulation, Journal of the Indian Roads Congress. DOI: http://dx.doi.org/10.1061/(ASCE)TE.1943-5436.0000176, 69(2): 133-149.
Arasan, V.T; Arkatkar, S.S. 2011. Microsimulation Study of Vehicular Interactions in Heterogeneous Traffic Flow on Intercity Roads, European Transport, 48: 60-86.
Arasan,V.T.; Dhivya, G. 2008. Measuring Heterogeneous Traffic Density, World Academy of Science, Engineering and Technology, 2: 10-22.
Chandra, S.; Sikdar, P.K. 1993. Dynamic PCU for Intersection Capacity Estimation, Indian Highways, 23(4): 5-11.
Highway Capacity Manual. 2010. Transportation Research Board, National Research Council, Washington, D.C.
Indian Roads Congress. 1994. Guidelines for the Design of At-Grade Intersections in Rural and Urban Areas-Special Publication 41. IRC, New Delhi, India.
Joshi, G.; Vagadia, D. 2013. Dynamic vehicle equivalent factors for characterization of mixed traffic for multilane metropolitan arterials in India, Journal of Indian Roads Congress, 74(2): 205-219.
Patil, G.R.; Krishna Rao, K.V.; Xu, N. 2007. Saturation flow Estimation at signalized intersections in Developing countries, 86th Transportation Research Board Annual Meeting,Washington, D.C, 07-1570.
Praveen, P.S.; Arasan, V.T. 2013. Influence of traffic mix on PCU value of vehicles under heterogeneous traffic conditions, International Journal for Traffic and Transport Engineering. DOI: http://dx.doi.org/10.7708/ijtte.2013.3(3).07, 3(3): 302-330.
Radhakrishnan, P.; Mathew, V.T. 2011. Passenger car units and saturation flow models for highly heterogeneous traffic at urban signalised intersections, Transportmetrica. DOI: http://dx.doi.org/10.1080/18128600903351001, 7(2): 141-162.
Rahman, M.M.; Okura, I.; Nakamura, F. 2004. Effects of Rickshaws and Auto-Rickshaws on the Capacity of Urban Signalized Intersections, IATSS Research. DOI: http://dx.doi.org/10.1016/S0386-1112(14)60089-3, 28(1): 26-33.
Sheela, A.; Isaac, K.P. 2014. Traffic simulation model and its application for estimating saturation flow at signalised intersection, International Journal of Traffic and Transport Engineering. DOI: http://dx.doi.org/10.7708/ijtte.2014.4(3).06, 4(3): 320-338.
Vien, L.L.; Ibrahim, W.H.W.; Sadullah, A.F.M. 2003. Determination of passenger car equivalents using the headway ratio method at signalsed intersection, International Journal of Engineering Science and Technology, 3(2): 109-214.
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