@article{ref1,
title="Impact evaluation of camera enforcement for traffic violations in Cali, Colombia, 2008-2014",
journal="Accident analysis and prevention",
year="2019",
author="Martínez-Ruíz, Diana Marcela and Fandiño-Losada, Andres and Ponce de Leon, Antonio and Arango-Londoño, David and Mateus, Julio Cesar and Jaramillo-Molina, Ciro and Bonilla-Escobar, Francisco Javier and Vivas, Harvy and Vanlaar, Ward G. M. and Gutiérrez-Martínez, María Isabel",
volume="125",
number="",
pages="267-274",
abstract="INTRODUCTION: Cameras for detecting traffic violations have been used as a measure to improve road safety in different countries around the world. In Cali, Colombia, fixed cameras were installed in March 2012 on a number of roads and intersections. All camera devices are capable of detecting simultaneously the following traffic violations: driving over the speed limit, running a red light or stop sign, violation of the traffic ban schedule, and blocking the pedestrian crosswalk. <br><br>OBJECTIVE: To evaluate the impact of camera enforcement of traffic violations in Cali, Colombia. <br><br>METHODS: A quasi-experimental difference-in-differences study with before and after measurements and a comparison group was conducted. We observed 38 intervention areas and 50 comparison areas (250 m radius), during 42 months before and 34 months after the installation of cameras. Effects were estimated with mixed negative binomial regression models. <br><br>RESULTS: In intervention areas, after 12 months, there was a reduction of 19.2% of all crashes and a 24.7% reduction of injury and fatal crashes. In comparison areas, this reduction was 15.0% for all crashes and 20.1% for injury and fatal crashes. After adjusted comparisons, intervention sites outperformed comparison sites with an additional yearly reduction of 5.3% (p = 0.045) for all crashes. <br><br>CONCLUSIONS: The use of cameras for detecting traffic violations seems to have a positive effect on the reduction of crashes in intervention areas. A beneficial spillover effect was found as well in comparison areas; but more evaluations are needed.<br><br>Copyright © 2019 Elsevier Ltd. All rights reserved.<p /> <p>Language: en</p>",
language="en",
issn="0001-4575",
doi="10.1016/j.aap.2019.02.002",
url="http://dx.doi.org/10.1016/j.aap.2019.02.002"
}