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- W626617297 abstract "Traffic congestion on arterial streets is frequently mentioned as an important issue in the Phoenix Metropolitan Area and in other major metropolitan areas. The Maricopa Association of Governments Transportation Planning Office needed to analyze over 400 intersections in the Phoenix metropolitan area to determine the Level of Service (LOS). Aerial photographs of intersection queue lengths combined with ground counts provide a cost effective way of determining the LOS at these intersections. This paper describes the validity of using this method. For the validation, four of the 400 intersections were studied in detail. Three types of data were collected simultaneously at each of these four intersections included in the study: aerial photographs, queue lengths, and machine counts. Aerial photographs were taken at ten minute intervals to record the queue lengths. The queue lengths were also counted by observers on the ground to verify the accuracy of the aerial photographs. In addition, machine traffic counts were taken at each approach of the intersections to measure the total volume of vehicles. The aerial photography provided a good estimate of the average hourly queue length by approach. Further, this hourly queue length estimate was found to be a good predictor of the peak 15 minute queue length. The average stopped delay was then estimated using the approach volume counts and related to LOS using the 1985 Highway Capacity Manual criteria. Aerial photography combined with machine counts provided a good estimate of levels of service at the intersections evaluated. In addition, the aerial photographs provided a permanent record to examine if there were any questions about the data." @default.
- W626617297 created "2016-06-24" @default.
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- W626617297 date "1993-09-01" @default.
- W626617297 modified "2023-09-27" @default.
- W626617297 title "VALIDITY OF AVERAGE STOPPED DELAY ESTIMATES BASED ON AERIAL PHOTOGRAPHY" @default.
- W626617297 hasPublicationYear "1993" @default.
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