Abstract
Horizontal curves are an integral part of the highway alignment. However, a disproportionately high number of severe crashes occur on them. One method transportation agencies use to reduce the number crashes at horizontal curves is the installation of curve warning signs which post an appropriate advisory speed. Appropriate curve advisory speeds can be determined using several methods. Some of these methods are time-consuming to perform and are error-prone. The purpose of this research was to find the most efficient and accurate data collection method for determining curve advisory speeds. Several processes were developed and tested. They were then validated against the results of a manual process referred to as the Direct Method and other traditional methods (such as the ball-bank indicator), which are generally assumed to produce accurate results. Comparing the results of these methods allow researchers evaluate their accuracy and usefulness for setting advisory speeds. The results illustrate the potential of a more user-friendly methodology that allows for efficient and accurate data collection. The advisory speeds determined by this research will assist the Kentucky Transportation Cabinet to properly sign horizontal curves. Previous research suggests that posting appropriate advisory speeds results in a safer driving experience.
Report Date
7-2016
Report Number
KTC-16-14/SPR15-507-1F
Digital Object Identifier
https://doi.org/10.13023/KTC.RR.2016.14
Repository Citation
Green, Eric R.; Agent, Kenneth R.; and Lammers-Staats, Erin, "Development of an Improved Method for Determining Advisory Speeds on Horizontal Curves" (2016). Kentucky Transportation Center Research Report. 1566.
https://uknowledge.uky.edu/ktc_researchreports/1566
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 Center, the Kentucky Transportation Cabinet, the United States Department of Transportation, or 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 and should not be considered an endorsement.
© 2016 University of Kentucky, Kentucky Transportation Center
Information may not be used, reproduced, or republished without KTC’s written consent.