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- W419285884 abstract "This study analyzed the impact of emergency vehicle traffic signal preemption across three coordinated intersections on Route 7 (Leesburg Pike near Landsdowne) in Virginia. The Federal Highway Administration's (FHWA's) Traffic Software Integrated System (TSIS) package, which includes the CORSIM simulation model and the vehicle animator, TRAFVU, was used for this study. Using FHWA's Traffic Research Laboratory as a test bed, ITT Systems utilized the Controller Interface Device (CID) to interface a modified version of the CORSIM simulation with Type 170 controllers programmed with the identical signal plans to those existing at the Route 7 intersections, with minor modifications to allow signal preemption. In this carefully controlled hardware-in-the-loop environment, CORSIM provided the microscopic simulation and tabulation of measures of effectiveness (MOEs), but instead of CORSIM emulating controller features, the simulation package sent detector information to the physical controllers and read-back phase indicators. Since CORSIM tabulates MOEs, quantitative results with and without preemption measurements were obtained. Results showed that for the geometric and operational conditions studied, the impact of emergency signal preemption on the signal coordination of the corridor was minor. Although several of the preemption cases had statistically significant means when compared to the base case (no preemption), the magnitude of the 1.6% increase in average travel time was considered minor. Relatively long spacing between intersections, platoon dispersion over long distances, and very long cycle lengths were judged to be some of the reasons for this increase. The information contained in this report will be of assistance to public agencies considering the installation of emergency signal preemption systems and to Intelligent Transportation Systems engineers." @default.
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- W419285884 date "1999-07-01" @default.
- W419285884 modified "2023-09-24" @default.
- W419285884 title "EVALUATION OF EMERGENCY VEHICLE SIGNAL PREEMPTION ON THE ROUTE 7 VIRGINIA CORRIDOR" @default.
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