Monitoring and diagnostics of traffic signal preemption controllers
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United States of America Patent
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Dec 17, 2013
Grant Date -
Aug 11, 2011
app pub date -
Feb 11, 2010
filing date -
Feb 11, 2010
priority date (Note) -
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status (Latency Note)
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Abstract
Management of traffic signal preemption control equipment. In one approach, logged preemption data is periodically read from each of a plurality of intersections having respective preemption controllers for preempting traffic signals at the intersections. The logged preemption data at an intersection describes operational states of the preemption controller and each vehicle control unit that submitted a preemption request at the intersection and data describing each individual preemption request. The logged preemption data read from the plurality of intersections are stored in a database. The database is monitored for data indicative of changes in operational status of the traffic signal preemption control equipment. In response to the data indicating a change in operational status, data descriptive of the change are output.
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