NDLI: Speedup of DTA-Based Simulation of Large Metropolises for Quasi Real-Time ITS Applications

Content Provider	IEEE Xplore Digital Library
Author	Koulakezian, A. Graydon, B. Abdelgawad, H. Abdulhai, B. Yi-Chang Chiu Leon-Garcia, A.
Copyright Year	2015
Description	Author affiliation: Dept. of Civil Eng. & Eng. Mech., Univ. of Arizona, Tucson, AZ, USA (Abdulhai, B.) \|\| Dept. of Civil Eng., Univ. of Toronto, Toronto, ON, Canada (Abdelgawad, H.; Yi-Chang Chiu) \|\| Dept. of Electr. & Comput. Eng., Univ. of TorontoToronto, Toronto, ON, Canada (Koulakezian, A.; Graydon, B.; Leon-Garcia, A.)
Abstract	The assessment of real-time intelligent transportation system (ITS) applications, such as traffic management and adaptive route guidance systems, requires the use of fast and near real-time dynamic traffic simulation models. Even off-line applications, used for testing planning scenarios, often require fast-enough traffic simulation models that enable the required repetitive simulations. This is even more critical for large-scale networks with millions of vehicles. This paper investigates the speedup of DTA simulation models, using compiler optimizations and parallelism. DynusT as a widely used DTA model was evaluated as a test case, while its results could be generalized because we have used real-networks and calibrated them using real data sets in the Greater Toronto and Hamilton Area (GTHA). Extensive testing is performed to evaluate various dimensions for speed-up including: network size, number of processors, various optimization levels and operating systems. The performance results show that compiler optimizations and parallelism allow to: 1) double the speed required for a 4-hour simulation after 12 iterations to reach equilibrium, and 2) bring down the initial simulation time (required for network loading) by 2.5 times, enabling the testing of various real-time ITS applications.
Starting Page	483
Ending Page	490
File Size	466298
Page Count	8
File Format	PDF
ISSN	21530017
e-ISBN	9781467365963
DOI	10.1109/ITSC.2015.86
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2015-09-15
Publisher Place	Spain
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Vehicles Program processors Optimization Computational modeling Load modeling Parallel processing Vehicle dynamics
Content Type	Text
Resource Type	Article

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