The NHCRP Report 600: Human Factors Guidelines for Road Systems (2nd Edition, 2012) is a Transportation Research Board publication. The guideline “provides data and insights of the extent to which road users’ needs, capabilities, and limitations are influenced by the effects of age, visual demands, cognition, and influence of expectancies.

NCHRP Report 600 provides guidance for roadway location elements and traffic engineering elements. The report also provides tutorials on special design topics, an index, and a glossary of technical terms. ” – TRB news. The guide can be downloaded in PDF.