United States Department of Transportation
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Intelligent traffic signals : extending the range of self-organization in the BML model.
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2013-04-01
[PDF-1.35 MB]
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NTL Classification:NTL-OPERATIONS AND TRAFFIC CONTROLS-Traffic Flow;NTL-HIGHWAY/ROAD TRANSPORTATION-HIGHWAY/ROAD TRANSPORTATION;NTL-PLANNING AND POLICY-Management Systems;
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Abstract:The two-dimensional traffic model of Biham, Middleton and Levine (Phys. Rev. A, 1992) is
a simple cellular automaton that exhibits a wide range of complex behavior. It consists of both
northbound and eastbound cars traveling on a rectangular array of cells, each cell equipped
with a traffic signal. The traffic signals switch synchronously from allowing northbound flow
to eastbound flow. By gating individual traffic signals, i.e. allowing individual traffic signals
to break from synchrony in predetermined, deterministic scenarios based on the local state of
traffic, the range for which the system self-organizes into a state of unimpeded flow is extended.
On a 100x100 cell array, this additional intelligence enables accomodation of 200 cars more
than the original BML model, without any reduction in average velocity.
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