skip navigation

PUBLICATIONS

Register for Latest Research

Stay Informed
Register with NCJRS to receive NCJRS's biweekly e-newsletter JUSTINFO and additional periodic emails from NCJRS and the NCJRS federal sponsors that highlight the latest research published or sponsored by the Office of Justice Programs.

NCJRS Abstract

The document referenced below is part of the NCJRS Virtual Library collection. To conduct further searches of the collection, visit the Virtual Library. See the Obtain Documents page for direction on how to access resources online, via mail, through interlibrary loans, or in a local library.

 

NCJ Number: 67148 Add to Shopping cart Find in a Library
Title: EVALUATING THE EFFECTIVENESS OF ONE-OFFICER VERSUS TWOOFFICER PATROL UNITS
Journal: JOURNAL OF CRIMINAL JUSTICE  Volume:7  Issue:4  Dated:(WINTER 1979)  Pages:325-355
Author(s): E H KAPLAN
Corporate Author: Pergamon Press, Inc
United States of America
Date Published: 1979
Page Count: 31
Sponsoring Agency: Pergamon Press, Inc
Elmsford, NY 10523
US Dept of Justice

US Dept of Justice NIJ Pub
Washington, DC 20531
Grant Number: 78NI-AX-0007
Format: Article
Language: English
Country: United States of America
Annotation: THIS ARTICLE PRESENTS A MODEL-BASED EVALUATION OF ONEVERSUS TWO-OFFICER PATROL CAR; THE PROS AND CONS OF EACH STRATEGY ARE DISCUSSED, AND PERFORMANCE MEASURES ARE MODELED AND ANALYZED FOR BOTH STAFFING STRATEGIES.
Abstract: FOR A GIVEN MANPOWER LEVEL, ONE-OFFICER PATROLS FIELD TWICE AS MANY CARS AS THE TWO-OFFICER AND INCREASE POLICE VISIBILITY, PREVENTIVE PATROL TIME, AND THE AREA COVERED BY PATROLS. HOWEVER, TWO-MAN PATROLS ARE SAFER FOR POLICE, COST LESS (SINCE THEY REQUIRE HALF AS MANY CARS), AND PROVIDE BETTER-QUALITY SERVICE, SINCE MANY SERVICE CALLS REQUIRE AT LEAST TWO OFFICERS. FROM THESE ARGUEMENT, ONE MAY ELICIT RELEVANT PERFORMANCE MEASURES FOR COMPARATIVE ANALYSIS. THESE INCLUDE EXPECTED AREA COVERED BY PATROL, RESPONSE TIME FROM THE NEAREST VEHICLE TO A RANDOMLY OCCURRING INCIDENT, EXPECTED FREQENCY OF PATROL, VISIBILITY OF PATROL, PROBABILITY OF INTERCEPTING A RANDOMLY OCCURRING CRIME IN PROGRESS, PROBABILITY OF OFFICER INJURY, AND COMPARATIVE COSTS. SIMPLE PROBABILISTIC MODELS ARE USED TO COMPARE THE TWO STAFFING STRATEGIES ON THESE PERFORMANCE MEASURES, AS WELL AS EXPERIMENTAL DATA FROM A SAN DIEGO, CALIF., STUDY ON PATROL. RESULTS SHOW THAT DOUBLING THE NUMBER OF AVAILABLE UNITS IN A BEAT DOES NOT DOUBLE THE COVERAGE CONCENTRATION, AND COVERAGE INCREASES ARE MOST SIGNIFICANT IN LARGE BEATS. ALTHOUGH ONE-MAN UNITS MAY REDUCE RESPONSE TIME CONSIDERABLE SINCE MORE UNITS ARE AVAILABLE, INCREASES IN POLICE VISIBILITY ARE LIKELY TO SET IN ONLY AFTER SOME CRITICAL LEVEL OF ONE-UNIT PARTOL HAS BEEN REACHED. INCREASES IN CRIME INTERCEPTION DUE TO SWITCHING FROM TWO-MAN TO ONE-MAN UNITS IS MOST SIGNIFICANT IN BEATS WITH HEAVY WORKLOADS. IN AT LEAST ONE CITY, RISK OF INJURY IS EQUIVALENT FOR OFFICERS IN ONE- AND TWO-MAN UNITS. FINALLY, ADDITIONAL COST DUE TO SWITCHING FROM TWO- TO ONE-MAN UNITS IS, IN SAN DIEGO, $2.51 PER HOUR PER UNIT. THUS, MAXIMUM USE OF ONE-MAN UNITS IS FAVORED. IMPLICATIONS FOR FURTHER RESEARCH, AN APPENDIX, CHARTS, TABLES, AND MUCH MATHEMATICS ARE INCLUDED. (PAP)
Index Term(s): Cost/Benefit Analysis; Patrol units; Team policing
To cite this abstract, use the following link:
http://www.ncjrs.gov/App/publications/abstract.aspx?ID=67148

*A link to the full-text document is provided whenever possible. For documents not available online, a link to the publisher's website is provided. Tell us how you use the NCJRS Library and Abstracts Database - send us your feedback.