Volume : III, Issue : III, March - 2014

Effect of off–Ramp on A Single Lane Road Using Modified CA

Dr. Kamini Rawat , Ms. Parveen Bawa

Abstract :

Traffic flow is a realization of an open one–dimensional many body system with strong correlation among vehicles. To overcome the limitations associated with the conventional simulation techniques a new paradigm is required. The study of cellular automata (CA) is done for that purpose. Cellular automata are mathematical idealizations of physical systems in which space and time are discrete, and physical quantities take on a finite set of discrete values. A cellular automaton consists of a regular uniform lattice, usually finite in extent, with discrete variables occupying various sites. The state of a cellular automaton is completely specified by values of variables at each site. Based on Nasch model of single lane traffic flow with off–ramp, a modified Cellular Automaton traffic flow model is proposed. The model is developed with reduced cell size, incorporating different acceleration characteristics depending upon the speed of each individual vehicle. Influence of the off–ramp probability over traffic flow is discussed. Phase transition on a highway for homogeneous traffic in velocity–dependent acceleration rate TCA model with an off–ramp is studied. Numerical simulations with open boundary conditions are carried out. Influence of off–ramp and injection probabilities over capacity flow of traffic system with off–ramp is discussed. Comparisons are made between Nasch model and modified model. It is observed that transition from free flow to congested flow and free flow to saturated flow is affected because of dissimilar acceleration capabilities. Effect of length of deceleration lane over flow rate of modified model is similar to Nasch model.  

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Article: Download PDF   DOI : 10.36106/ijsr  

Cite This Article:

Dr. Kamini Rawat , Ms. Parveen Bawa Effect of off-Ramp on A Single Lane Road Using Modified CA International Journal of Scientific Research, Vol.III, Issue.III March 2014


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