EMS Stop Light Approach Detection for Preempting in Toronto, ON
Track: Highways and Roads
Authors: Ian McGowan
Red light delays were eliminated by allowing EMS to use its GPS moves to indicate to a stop light box of approach & direction. Tracks to a set of lights were geocoded (polyline dataset ß). Coords read from simulated vehicular mounted GPS devices (data ?) were analyzed. ? is overlayed on ß. Nearby ß points trigger a match, indicate direction & approach. 15 of 15 runs, in & out of study area: correct directions, no mis-detections. Paper shows the lat/long coord SQL & difference calc methodology.