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NCJRS Abstract

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NCJ Number: 120198 Find in a Library
Title: Impact of the 65 MPH Speed Limit in Arizona
Author(s): T Epperlein
Corporate Author: Arizona Criminal Justice Cmssn, Statistical Analysis Ctr
United States of America
Date Published: 1989
Page Count: 9
Sponsoring Agency: Arizona Criminal Justice Cmssn, Statistical Analysis Ctr
Phoenix, AZ 85007
Bureau of Justice Statistics (BJS)
Washington, DC 20531
National Institute of Justice/
Rockville, MD 20849
NCJRS Photocopy Services
Rockville, MD 20849-6000
Grant Number: 87-BJ-CX-K053
Sale Source: National Institute of Justice/
NCJRS paper reproduction
Box 6000, Dept F
Rockville, MD 20849
United States of America

NCJRS Photocopy Services
Box 6000
Rockville, MD 20849-6000
United States of America

Arizona Criminal Justice Cmssn, Statistical Analysis Ctr
1110 W. Washington Ste 230
Phoenix, AZ 85007
United States of America
Document: PDF
Type: Survey
Language: English
Country: United States of America
Annotation: Traffic crashes and casualties have escalated dramatically after the maximum speed limit was raised from 55 to 65 mph on Arizona's rural interstate highways.
Abstract: Highway figures for fatal injury-producing traffic crashes and for resulting deaths and injuries were compiled from records of the Arizona Department of Transportation for the period covering January 1982 to December 1988. Interrupted time-series methods were used to measure changes in pre-post law periods. Traffic crashes increased by 32 percent after the new law, while deaths and injuries rose by 36 percent. At the same time, no appreciable increase in traffic crashes or casualties was measured for Arizona's urban interstate highways on which the maximum speed limit remained at 55 mph. The analysis further showed that the increase in traffic casualties following the new law was permanent. Through December 1988, over 1,000 deaths were attributed to the higher speed limit. An additional 3 deaths and 50 injuries occurred on Arizona's rural interstates in each month since the 65 mph speed limit became law. The report concludes that these casualties would not have occurred if the speed limit remained at 55 mph. 1 reference, 1 table, 4 figures.
Main Term(s): Highway safety
Index Term(s): Arizona; Traffic laws
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