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Publication Number: FHWA-HRT-13-047
Date: August 2013
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The overall goals of this research on complex interchanges were to increase understanding of motorists’ expectations when navigating complex interchanges, determine how those expectations affect their behavior, and discover how the safety of the interchanges can be effectively increased through the use of better signing and marking practices.
Based on the initial literature review task and other ongoing work, the project was divided into two studies: (1) conduct a driving simulator study and (2) develop a metric that can score, rate, or otherwise categorize interchange complexity. This report documents a Federal Highway Administration project that identified potential improvements to current signing practices for complex interchanges and developed a spreadsheet decision tool for defining and quantifying interchange complexity.
This report is of interest to engineers, planners, and other practitioners who are concerned about implementing signing treatments for freeways as well as city, State, and local authorities who have a shared responsibility for ensuring public safety.
Monique R. Evans
Director, Office of Safety
Research and Development
This document is disseminated under the sponsorship of the U.S. Department of Transportation in the interest of information exchange. The U.S. Government assumes no liability for the use of the information contained in this document. This report does not constitute a standard, specification or regulation.
The U.S. Government does not endorse products or manufacturers. Trademarks or manufacturers’ names appear in this report only because they are considered essential to the objective of the document.
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Topics: research, safety
Keywords: research, safety, Complex Interchanges, Signs, Simulator Study, Spreadsheet Tool
TRT Terms: research, Safety and security, Safety, Transportation safety