Turner-Fairbank Highway Research Center

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NCHRP Project 15-27, "Safety Impacts of Design Element Trade-Offs"

Product Type

Research Report


Stamatiadis, N.




Published as NCHRP Report 633

Link To Research Report

Link not available.


Accident modification factors
Crash prediction models
Four lane highways
Geometric design
Highway safety
Road shoulders
Rural highways

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HSIS Summaries

HSIS Summary Reports are two to eight pages in length and include a brief description of the issue addressed, data used, methodology applied, significant results, and practical implications.

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Research Reports

A variety of research studies have been performed using data from HSIS. Many of the final reports prepared are now available electronically.

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Technical Summaries

Research reports are often summarized in executive summaries, technical briefs, or other abbreviated formats. Included here are those road safety summaries that involved research using HSIS data.

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Safety Analysis Tools

In addition to conducting research, HSIS resources are also used to develop products that can be used by practitioners in the analysis of safety problems.

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Other Projects

HSIS data are sometimes used in research studies that result in other types of finished products, such as dissertations, theses, and conference proceedings.

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