Shauna Hallmarkshallmar@iastate.edu email >
About the research
Although chevron alignment signs have been utilized for some time along horizontal curves, their effectiveness is not well documented. The Crash Modification Factors Clearinghouse includes crash modification factors (CMFs) for chevrons from 0.41 to 1.92 (FHWA 2015).
The lack of documentation on the effectiveness of chevrons and the range of values for CMFs make it difficult for agencies to estimate the cost effectiveness of chevrons. As a result, the objective of this study was to develop a CMF for chevron alignment signs that can be used by Iowa agencies to help address crashes on curves.
Federal Highway Administration TSF Funding
Iowa Department of Transportation
Midwest Transportation Center
Contract Number: DTRT13-G-UTC37