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原文传递 Development of Intersection Performance Measures for Timing Plan Maintenance Using an Actuated Controller: Phase 1.

题名：	Development of Intersection Performance Measures for Timing Plan Maintenance Using an Actuated Controller: Phase 1.
作者：	E. J. Smaglik; C. A. Roberts;
关键词：	arizona, maintenance, performance measures, traffic signal coordination, traffic signal control systems, traffic signal devices, traffic signals, traffic volume, video imaging detectors
摘要：	This proof-of-concept study is to develop an automated data collection module for collection and management of traffic data at signalized intersections controlled by the Arizona Department of Transportation (ADOT). The objective of this proof-of-concept phase of the work was to determine the feasibility and cost of modifying an existing ADOT traffic control cabinet to collect operational data using the video equipment installed for presence detection to capture vehicle flow rate information. The goal was to use this data to develop event-based performance measures, leveraging existing infrastructure to its fullest extent. An intersection in Flagstaff, Arizona, was chosen as the test location. Researchers used the intersections existing video detection cameras, installing additional video detector interface cards to produce contact-closure vehicle flow rate information. Researchers calculated performance measures (volume-to-capacity (V/C) ratio, equivalent hourly volume (EHV), and cumulative counts) from the video-generated data and compared them with measures generated from concurrent manually counted data over a 24-hour analysis period. The V/C values generated from the video data were shown to be statistically different than those calculated with manual-count data; however, on all but one phase, the difference was not operationally significant. An analysis of cumulative count data did show operationally significant differences. While the data had some inaccuracies, the proof of concept was successful in that the research team was able to generate traffic volume performance measures using existing video detection equipment. During the next phase of the project, the data inaccuracies can be investigated and possibly addressed with measures such as camera placement, choice of technology, etc. A cost analysis determined that the cost of equipping a similar intersection for this type of vehicle count capability is approximately $16,700 using the equipment specified for
总页数：	62p
报告类型：	科技报告