Reversible discrete event formulation and optimistic parallel execution of vehicular traffic models Online publication date: Mon, 21-Sep-2009
by Srikanth B. Yoginath, Kalyan S. Perumalla
International Journal of Simulation and Process Modelling (IJSPM), Vol. 5, No. 2, 2009
Abstract: Vehicular traffic simulations are useful in applications such as emergency planning and traffic management, for rapid response and resilience. Here, a parallel traffic simulation approach is presented that reduces the time for simulating emergency vehicular traffic scenarios. We use a reverse computation-based optimistic execution approach to parallel execution of microscopic, vehicular-level models of traffic. The unique aspects of this effort are: exploration of optimistic simulation of vehicular traffic; addressing the related reverse computation challenges; achieving absolute, as opposed to self-relative, speedup. The design, development and performance study of the parallel simulation system is presented, demonstrating excellent sequential and parallel performance. A speed up of nearly 20 on 32 processors is observed on a vehicular network of 65,000 intersections and 13 million vehicles.
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