Centralized Management of Preemption Control of Traffic Signals

A system for managing traffic signal preemption at a plurality of intersections, comprising:

• a processor;
• a common bus coupled to the processor;
• a memory unit coupled to the common bus;
• a network adapter;
• and
• an input/output unit coupled to a common bus;
• wherein, the processor, memory, network adapter, and input/output unit are configured to:
• receive a security level code input that specifies one of a plurality of security levels for at least one jurisdiction, wherein the security level input controls which emitter codes are allowed to preempt traffic signals at the plurality of intersections in the jurisdiction;
• determine a set of emitter codes for the plurality of intersections in the jurisdiction in response to the security level code;
• and
• download the set of emitter codes to a plurality of preemption controllers at the plurality of intersections in the jurisdiction, wherein 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 plurality of intersections in the jurisdiction.

An article of manufacture, comprising:

• a processor-readable storage medium configured with processor-executable instructions, the instructions when executed by a processor causing the processor to perform operations including:
• receiving a security level code input that specifies one of a plurality of security levels for at least one jurisdiction, wherein the security level input controls which emitter codes are allowed to preempt traffic signals at the plurality of intersections in the jurisdiction;
• determining a set of emitter codes for the plurality of intersections in the jurisdiction in response to the security level code;
• and
• downloading the set of emitter codes to a plurality of preemption controllers at the plurality of intersections in the jurisdiction, wherein 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 plurality of intersections in the jurisdiction.