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                National Cooperative Highway Research Program (NCHRP) Report 600: Human Factors Guidelines for Road Systems: Second Edition
**Description:**
        NCHRP Report 600 is complimentary to other primary design references and standards, including the Highway Safety Manual. It contains guidelines that provide human factors principles and findings for consideration by highway designers and traffic engineers. Human capabilities are presented to show how current standards are defined. This guide can help to understand why certain standards exist, and the potential safety consequences of not meeting those standards. The guidelines allow the non-expert in human factors to consider the roadway user’s capabilities and limitations in the design and operation of highway facilities.
Human Factors is a discipline that enhances the relationship between devices and systems, and the people who are meant to use them. Human factors considerations contained in this guide are used to supplement standards that are outdated, do not consider roadway users, or are based on incorrect assumptions about road users’ capabilities and limitations. This guide may be particularly useful to those unfamiliar with human factors, and during the safety management process to help diagnose safety issues and identify appropriate countermeasures.
    
          **Tool Type:**
        Informational Guide
    
    
    
          **Owner Source:**
        organization
    
          **Sponsor/Owner:**
        National Cooperative Highway Research Program (NCHRP)
    
        **Published:**
      2008
    
        **Availability:**
      The first edition is available free of charge at the following link: NCHRP Report 600: Human Factors Guidelines First Edition
The second edition is available free of charge at the following link: NCHRP Report 600: Human Factors Guidelines Second Edition.
    
          **Disclaimer:**
        This information 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 herein. This information does not constitute a standard, specification, or regulation. The U.S. Government does not endorse products or manufacturers. Trademarks or manufacturer's names appear in this information only because they are considered essential to the objective of this publication.
          Any opinions, findings, and conclusions or recommendations, and translations thereof, expressed in this publication are those of the author(s) and do not necessarily reflect the views of the Federal Highway Administration. U.S. DEPARTMENT OF TRANSPORTATION

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