Abstract: According to the disclosed approaches, a server system receives vehicle messages having information transmitted from vehicle processors. Each vehicle message specifies published geographical coordinates that indicate a geographical location of a vehicle. For each vehicle message, the server system determines one or more virtual phase selectors associated with the published geographical coordinates; determines whether each virtual phase selector is active or inactive; starts execution of each virtual phase selector determined to be in inactive; and communicates the vehicle message to the one or more virtual phase selectors. Each virtual phase selector determines traffic signal control data based on the vehicle message and transmits the traffic signal control data to a traffic signal controller associated with the virtual phase selector.

Abstract: According to the disclosed approaches, a server system receives vehicle messages having information transmitted from vehicle processors. Each vehicle message specifies published geographical coordinates that indicate a geographical location of a vehicle. For each vehicle message, the server system determines one or more virtual phase selectors associated with the published geographical coordinates; determines whether each virtual phase selector is active or inactive; starts execution of each virtual phase selector determined to be in inactive; and communicates the vehicle message to the one or more virtual phase selectors. Each virtual phase selector determines traffic signal control data based on the vehicle message and transmits the traffic signal control data to a traffic signal controller associated with the virtual phase selector.

Abstract: Approaches for monitoring traffic signal preemption at one or more intersections. According to one embodiment, a road map that includes a plurality of roads and intersections is displayed with a computer system. Preemption data periodically received by the computer system from at least one preemption controller at a respective intersection is used to update the road map. In response to the preemption data, the road map is updated to include a traffic signal icon at the respective intersection and a vehicle icon at a location on the map corresponding to a location of a vehicle transmitting a preemption request as indicated by the preemption data.

Abstract: Methods and systems for creating an approach map for a traffic signal preemption controller. A road map is displayed, and in response to user input for instantiating a first segment of an approach map, a first instance of a graphical object overlaying one of the plurality of roads is displayed. The one road represents an approach road to an intersection having the preemption controller. First segment location data that describes a first geographical area bounded by the first segment are determined from size and placement of the first instance of the graphical object on the road map and from location data associated with the one road. The first segment location data are stored in association with the approach map for the preemption controller. The preemption controller, once configured with the first segment location data, initiates traffic signal preemption in response to a preemption request transmitted from within the first geographical area described by the first segment location data.

Abstract: Methods and systems for creating an approach map for a traffic signal preemption controller. A road map is displayed, and in response to user input for instantiating a first segment of an approach map, a first instance of a graphical object overlaying one of the plurality of roads is displayed. The one road represents an approach road to an intersection having the preemption controller. First segment location data that describes a first geographical area bounded by the first segment are determined from size and placement of the first instance of the graphical object on the road map and from location data associated with the one road. The first segment location data are stored in association with the approach map for the preemption controller. The preemption controller, once configured with the first segment location data, initiates traffic signal preemption in response to a preemption request transmitted from within the first geographic area described by the first segment location data.

Abstract: Approaches for monitoring traffic signal preemption at one or more intersections. According to one embodiment, a road map that includes a plurality of roads and intersections is displayed with a computer system. Preemption data periodically received by the computer system from at least one preemption controller at a respective intersection is used to update the road map. In response to the preemption data, the road map is updated to include a traffic signal icon at the respective intersection and a vehicle icon at a location on the map corresponding to a location of a vehicle transmitting a preemption request as indicated by the preemption data.