System and method of communicating traffic information
A system and method of automatically communicating traffic information from a traffic probe vehicle to a traffic information and management system when the probe vehicle is operated within an active traffic information reporting region. Geographic information about a traffic reporting region, or plurality of regions, is stored in the probe vehicle as an array of geographic cells so as to reduce the data storage requirements. The geographic cells have associated with them certain cell parameters related to the cell, such as a recording priority, a recording interval and a reporting interval. The recording priority of a cell may be associated with certain roadway types located within that cell. As a probe vehicle travels within an active traffic information reporting region, its location is established within the traffic information reporting region and a corresponding geographic cell.
1. A method of reporting information from a vehicle to a vehicle data collection system, comprising:
storing information which defines a geographic region in a vehicle, the geographic region comprising a predetermined array of cells, each cell having a cell position;
associating a plurality of cell parameters with each cell, the cell parameters comprising a recording interval and a reporting interval;
determining a vehicle position relative to the geographic region, wherein if the vehicle is within the geographic region, the vehicle position is correlated to a vehicle cell;
recording vehicle data in accordance with the recording interval of the vehicle cell; and
reporting the vehicle data to a vehicle data collection system in accordance with the reporting interval;
repeating said steps of determining the vehicle position, recording the vehicle data and reporting the vehicle data for a plurality of cycles; and,
updating the information which defines the geographic region;
wherein the geographic region comprises a plurality of geographic regions and the method may be selectively enabled or disabled for each geographic region.
2. The method of claim 1 , further comprising updating at least one cell parameter.
3. The method of claim 1 , wherein the vehicle data comprises at least one datum from the group consisting of a vehicle speed, a vehicle heading, the vehicle position, a vehicle elevation and an ambient temperature.
4. The method of claim 1 , wherein the cell position comprises a latitudinal position and a longitudinal position.
5. The method of claim 4 , wherein the cell position further comprises an elevational position.
6. The method of claim 1 , wherein the cell parameters further comprise a recording priority.
7. The method of claim 6 , wherein the recording priority of a cell is determined as a function of a roadway type located within the cell.