Study on the method of freeway incident detection using wireless positioning terminal

摘要

Improving the performance of a incident detectionudsystem was essential to minimize the effect of incidents.udA new method of incident detection was broughtudforward in this paper based on an in-car terminaludwhich consisted of GPS module, GSM module andudcontrol module as well as some optional parts such asudairbag sensors, mobile phone positioning systemud(MPPS) module, etc. When a driver or vehicleuddiscovered the freeway incident and initiated an alarmudreport the incident location information located byudGPS, MPPS or both would be automatically send to audtransport management center (TMC), then the TMCudwould confirm the accident with a closed-circuitudtelevision (CCTV) or other approaches. In this method,uddetection rate (DR), time to detect (TTD) and falseudalarm rate (FAR) were more important performanceudtargets. Finally, some feasible means such asudmanagement mode, education mode and suitableudaccident confirming approaches had been put forwardudto improve these targets.ud