This report completes and updates the first edition of NCHRP Report 600 which was published previously in three collections. It contains guidelines that provide human factors principles and findings for consideration by, and is a resource document for, highway designers, traffic engineers, and other safety practitioners. Each of the design guidelines in the Human Factors Guidelines is presented using a consistent, highly structured format that is intended to maximize ease-of-use and interpretability. The guidelines focus on providing specific, actionable design principles, supported by a discussion and review of key research and analyses. Special design issues and considerations are included to help address design constraints and relevant trade-offs. (Author/publisher)
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