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Development of Crash Modification Factors for Curve Chevrons

Project Details
STATUS

Completed

PROJECT NUMBER

13-460

START DATE

05/01/13

END DATE

02/28/18

RESEARCH CENTERS InTrans, CTRE, MTC
SPONSORS

Federal Highway Administration
Iowa Department of Transportation
Midwest Transportation Center
USDOT/OST-R

Researchers
Principal Investigator
Shauna Hallmark

Director, InTrans

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.


Funding Sources:
Federal Highway Administration TSF Funding
Iowa Department of Transportation
Midwest Transportation Center
USDOT/OST-R

Contract Number: DTRT13-G-UTC37

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