TRB’s National Cooperative Highway Research Program (NCHRP) Report 600A, Human Factors Guidelines for Road Systems, Collection A includes Chapters 1, 2, 3, 4, 5, 10, 11, 13, 22, 23, 26, which explore human factors principles and findings for consideration by highway designers and traffic engineers. The report is designed to help the nonexpert in human factors to consider more effectively the roadway user’s capabilities and limitations in the design and operation of highway facilities.  Chapter 6 is expected in late 2008/early 2009. Additional chapters will be developed under NCHRP Project 17-41 according to the priorities established by the project panel and are expected in late 2010.

In October 2012 TRB released the NCHRP Report 600 Second Edition, which replaced NCHRP Reports 600A, 600B, and 600C.