Patent ID: 8610596

Claim:
A method for managing geographically dispersed traffic signal preemption control equipment, the traffic signal preemption control equipment including traffic signal preemption controllers and vehicle control units, comprising: periodically reading logged preemption data stored at each of a plurality of intersections having respective preemption controllers for preempting traffic signals at the intersections, the preempting being in response to preemption requests from the vehicle control units, wherein 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; storing the logged preemption data read from the plurality of intersections in a database in an electronic storage device; monitoring the database having the logged preemption data from the plurality of intersections 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, outputting data descriptive of the change; monitoring the database having the logged preemption data from the plurality of intersections for data indicative of an anomaly in operation of the preemption control equipment, the monitoring including comparing data from one of the plurality of intersections to data from others of the plurality of intersections; and outputting data indicative of the anomaly.