The Impact of Red Light Cameras (Automated Enforcement) on Safety in Arizona: Final Report

Washington, Simon; Shin, Kangwon; University of Arizona

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The Impact of Red Light Cameras (Automated Enforcement) on Safety in Arizona: Final Report

2005-08-01
By Washington, Simon ; Shin, Kangwon

[PDF-1.76 MB]

English

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Details:

Creators:

Washington, Simon ; Shin, Kangwon

Washington, Simon ; Shin, Kangwon Less -
Corporate Creators:

University of Arizona
Contributors:

Semmens, John
Corporate Contributors:

Arizona. Dept. of Transportation ; United States. Federal Highway Administration

Arizona. Dept. of Transportation ; United States. Federal Highway Administration Less -
Subject/TRT Terms:

[+]

Automated Enforcement Before And After Studies Cameras Crash Severity Crash Types Highways I73: Traffic Control I80: Accident Studies Impact Studies Left Turn Phase Operations And Traffic Management Recommendations Red Light Enforcement Camera Red Light Running Research Safety Safety And Human Factors Security And Emergencies Signalized Intersections Speed Traffic Crashes Traffic Law Enforcement Traffic Lights Traffic Safety Traffic Signals Traffic Signal Timing Warning Signs
Publication/ Report Number:

FHWA-AZ-05-550 ; Final Report 550

FHWA-AZ-05-550 ; Final Report 550 Less -
Resource Type:

Tech Report
Geographical Coverage:

United States ; Arizona ; Phoenix (Arizona)

United States ; Arizona ; Phoenix (Arizona) Less -
TRIS Online Accession Number:

1010926
OCLC Number:

62156789
Edition:

Final Report
Corporate Publisher:

Arizona. Dept. of Transportation
Abstract:

Red Light Cameras (RLCs) have been used in a number of US cities to yield a demonstrable reduction in red light violations; however, evaluating their impact on safety (crashes) has been relatively more difficult. Accurately estimating the safety impacts of RLCs is challenging for several reasons. First, many safety related factors are uncontrolled and/or confounded during the periods of observation. Second, “spillover” effects caused by drivers reacting to non-RLC-equipped intersections and approaches can make the selection of comparison sites difficult. Third, sites selected for RLC installation may not be randomly selected, and as a result may suffer from the regression to the mean effect. Finally, crash severity needs to be considered to fully understand the safety impacts of RLCs. With these challenges in mind this study was designed to estimate the safety impacts of RLCs on traffic crashes at signalized intersections in the state of Arizona and to identify which factors are associated with successful installations. RLC equipped intersections in the cities of Phoenix and Scottsdale are examined in detail to draw conclusions as to the relative success of RLC programs in these two jurisdictions. Both jurisdictions are operating successful installations of RLCs. Factors related to RLC effectiveness appear to include crash type and severity, left-turn phasing, presence of warning signs, approach speeds, and signal timing. Recommendations are made as to under what conditions should RLCs be considered.
Format:

PDF
Funding:

SPR-PL-1-(61) 550
Collection(s):

US Transportation Collection
Main Document Checksum:

[+]

urn:sha256:0b88d74b300669e6675eaa45261f84a28be32c98547436c3ea45efefa1fbd897
Download URL:

https://rosap.ntl.bts.gov/view/dot/38404/dot_38404_DS1.pdf
File Type:

No Additional Files

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The Impact of Red Light Cameras (Automated Enforcement) on Safety in Arizona: Final Report

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