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  • 8/14/2019 Evaluation of the City of Scottsdale Loop 101 Photo Enforcement Demonstration Program

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    Evaluation of the City of Scottsdale Loop 101

    Photo Enforcement Demonstration Program

    Final Report AZ-684

    Prepared by:

    Simon Washington, Ph.D.Kangwon ShinIda van SchalkwykArizona State UniversityDepartment of Civil & Environmental EngineeringTempe, AZ

    November 2007

    Prepared for:

    Arizona Department of Transportation206 South 17th AvenuePhoenix, Arizona 85007

    in cooperation withU.S. Department of TransportationFederal Highway Administration

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    Technical Report Documentation Page

    1. Report No.

    AZ-07-6842. Government Accession No. 3. Recipients Catalog No.

    5. Report Date

    November 20074. Title and Subtitle

    Evaluation of the City of Scottsdale Loop 101 Photo EnforcementDemonstration Program

    6. Performing Organization Code

    7. Authors

    Dr. Simon Washington, Kangwon Shin, and Ida van Schalkwyk8. Performing Organization Report No.

    10. Work Unit No.9. Performing Organization Name and Address

    Arizona State UniversityDepartment of Civil & Environmental EngineeringTempe, AZ 85287-5306

    11. Contract or Grant No. T0749A0022

    13.Type of Report & Period Covered

    Final Report

    12. Sponsoring Agency Name and Address

    Arizona Department Of Transportation206 S. 17th Avenue, Phoenix, Arizona 85007

    14. Sponsoring Agency Code

    15. Supplementary Notes

    Prepared in cooperation with the U.S. Department of Transportation, Federal Highway Administration

    16. Abstract

    Speeding is recognized as one of the most important factors causing traffic crashes. In 2005, 30% of all fatalcrashes were speeding-related (National Highway Traffic Safety Administration 2005). According to NHTSA,the cost of speed-related crashes is estimated to be $40.4 billion per year (National Highway Traffic SafetyAdministration 2005). Intelligent Transportation Systems (ITS) now exist to reduce speeding-related crashes byenforcing speed limits with camera-based technologies. These enforcement technologies are generically calledspeed cameras and have been effective on municipal streets and arterials in Arizona.

    The City of Scottsdale began automated enforcement efforts in December of 1996. On October 25, 2005,the Scottsdale City Council approved the nine-monthspeed enforcement camera demonstration programon a7.8-mile stretch of the SR 101 segment within Scottsdale. The speed enforcement program (SEP) began onJanuary 22, 2006 and ended on October 23, 2006. The demonstration program on the SR 101 freeway segmentin Scottsdale is the first use of the fixed-site photo enforcement equipment on a freeway in Arizona and isbelieved to be the first in the nation.

    This study was conducted to estimate the impact of the SEP on traffic safety, speed, speeding behavior,and daily travel time uncertainty. More specifically, the objectives were to estimate: the impact of the SEP onspeeding behavior; the changes in mean speed due to the SEP; the impact of the SEP on traffic safety in theenforcement zone; the total travel time impacts; and the economic impacts of the safety effects.

    17. Key Words

    Photo enforcement, speeding, safety, red light running,Empirical Bayes, before-after study, travel timesavings, motor vehicle crashes

    18. Distribution Statement

    Document is available to the U.S.public through the NationalTechnical Information Service,Springfield, Virginia 22161

    23. Registrants Seal

    19. Security Classification

    Unclassified

    20. Security Classification

    Unclassified

    21. No. of Pages

    154

    22. Price

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