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Crash History after Installation of Traffic Signals (Warranted vs. Unwarranted)
Kentucky Transportation Center Research Report
  • Kenneth R. Agent, University of Kentucky
  • Eric R. Green, University of Kentucky
Abstract
The objective of this study was to determine the change in crash history at intersections after installation of a traffic signal. Signals installed based on the warrants from an engineering study resulted in a decrease in angle collisions with an increase in the less severe rear end collisions. At intersections where signal warrants were not met, there was a smaller decrease in angle collisions and a larger increase in rear end collisions. The removal of unwarranted traffic signals did not result in a crash problem. The analysis shows that the warrants given in the MUTCD should be followed when determining the need for a traffic signal installation with the installation based on an engineering study.
Report Date
1-1-2008
Report Number
KTC-08-01/SPR328-07-1I
Digital Object Identifier
http://dx.doi.org/10.13023/KTC.RR.2008.01
Notes

The contents of this report reflect the views of the authors, who are responsible for the facts and accuracy of the data presented herein. The contents do not necessarily reflect the official views or policies of the University of Kentucky, the Kentucky Transportation Cabinet, nor the Federal Highway Administration. This report does not constitute a standard, specification, or regulation. The inclusion of manufacturer names or trade names is for identification purposes only and is not to be considered an endorsement.

Citation Information
Kenneth R. Agent and Eric R. Green. Crash History after Installation of Traffic Signals (Warranted vs. Unwarranted). (2008)
Available at: http://works.bepress.com/eric_green/9/