CENTRALIZED MANAGEMENT OF PREEMPTION CONTROL OF TRAFFIC SIGNALS

摘要

Managing traffic signal preemption at a plurality of intersections. In one approach a security level code that specifies one of a plurality of security levels for at least one jurisdiction is input (402). The security level controls which emitter codes are allowed to preempt traffic signals at the intersections in the jurisdiction. A set of emitter codes for the plurality of intersections in the jurisdiction is determined in response to the security level code (410). The set of emitter codes is downloaded to a plurality of preemption controllers at the plurality of intersections in the jurisdiction (412). Each preemption controller accepts a preemption request only if the preemption request contains an emitter code indicated by the downloaded set of emitter codes as being allowed to preempt traffic signals at the intersections in the jurisdiction.