Applicability of Emergency Preemption Signal Control under UTIS

Abstract Even thought the firefighters have to hurry to the scene to ext inguish the blaze, the fire engines could not rushed out due to the worst of traffic condition. Traffic signal control is one of th e most important methods to minimize the fire engines’s travel time. The focus of this paper is to develop a traffic control strategy, w hich is emergency vehicle preemption algorithm considering pede strian in order to reduce travel time of emergency vehicle. This algorith m also includes recovering strategy after preemption signal to minimize the other vehicle’s delay. In order to estimate the effectivene ss of traffic control, traffic simulation was performed using V ISSIM micro simulation tool for two different kinds of networks, whic h were non-coordinated corridor and coordinated corridor. The differences of travel time and average delay between emergency vehicle and ordinary vehicle were respectively estimated under pre-existed pretimed signal and preemption traffic control at t wo respective networks. The results of the simulation for the e mergency vehicle, travel time was reduced to 36.8~43.3% under “Add or Su btract” method whereas it was reduced to 30.7~46.0% under “Dwell” method. In addition, in non-coordinated corridor case o f ordinary vehicle, average control delay of “Dwell” method was increased 33.5% whereas it grew 0.5% under coordinated corridor . And “Add or Subtract” method was confirmed that average contr ol delay of ordinary vehicle was increased 0.7% under non-coordina ted corridor whereas it swelled 4.5% under coordinated corridor .key words : Preemption, Emergency Vehicle, Transition, Signal Strategy†본 논문은 대전발전연구원의 “소방차 출동체계와 ITS 연계방안(2012)”의 내용을 수정 및 보완한 것임 * 주저자 : 단국대학교 토목환경공학과 박사수료 ** 공저자 : 단국대학교 토목환경공학과 교수 *** 공저자 : 국립한밭대학교 도시공학과 교수**** 공저자 및 교신저자 : 대전발전연구원 연구위원†논문접수일 : 2012년 7월 5일†논문심사일 : 2012년 9월 10일†게재확정일 : 2012년 9월 20일