TRB’s National Cooperative Highway Research Program (NCHRP) Report 600B, Human Factors Guidelines for Road Systems, Collection B--including Chapters 6, 22 (Tutorial 3), and 23 (Updated)--explores 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.  Chapters 1 through 5, 10, 11, 13, 22 (Tutorials 1 and 2), 23, and 26 are available online.  Additional chapters, to be developed under NCHRP Project 17-41 according to the priorities established by the project panel, are expected in late 2010.

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