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NCJRS Abstract

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NCJ Number: 77771 Add to Shopping cart Find in a Library
Title: Evaluating a Police-implemented AVM (Automatic Vehicle Monitoring) System - The St Louis Experience (Phase 1)
Journal: IEEE Transactions on Vehicular Technology  Volume:VT-26  Issue:1  Dated:(February 1977)  Pages:60-70
Author(s): R C Larson; K W Colton; G C Larson
Date Published: 1977
Page Count: 11
Sponsoring Agency: US Dept of Justice

US Dept of Justice NIJ Pub
Washington, DC 20531
Grant Number: 75-NI-99-0014
Format: Article
Language: English
Country: United States of America
Annotation: Focusing on technology, operations, and attitudes, this paper presents a summary of an 18-month evaluation of the phase 1 Automated Vehicle Monitoring (AVM) System in district 3 in the St. Louis Metropolitan Police Department (Missouri).
Abstract: Technological evaluation of the phase I AVM system used tests which showed that 95 percent of the vehicle location estimates to be within 625 feet of the true location, and 80 percent of the estimates to be within 90 feet of the true location. However, because of the frequency of lost vehicles, an analysis was made to determine factors responsible for diminished accuracy. These are random error; quantization in time, distance, and angle; systematic error; open-loop tracking; missed signals; and susceptibility to subversion. Many of these errors are to be corrected in the phase 2 operations of the system. Evaluation indicated a reduction in dispatch time (12 percent in district 3) and an increase in dispatcher workload. Travel time dropped by 11 to 15 percent. Overall response time dropped about 12 percent, suggesting that the police department should also concentrate on other aspects of the police response system not directly related to the AVM in order to effect greater improvements in response time. Attitudinal evaluation showed a significant drop in positive attitudes of the police toward the AVM (from 64.4 percent before using the system to 39.8 percent after phase 1 implementation). The drop can be largely attributed to problems in system technical performance and reliability. Figures, footnotes, and 10 references are included.
Index Term(s): Automated vehicle monitors; Evaluation; Missouri; Police equipment
Note: Presented at the 10th Annual Carnahan Crime Countermeasures Conference, University of Kentucky, Lexington, KY, May 5-7, 1976.
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