The National Academies

NCHRP 17-47 [Final]

Human Factors Guidelines for Road Systems

  Project Data
Funds: $499,941
Research Agency: Battelle
Principal Investigator: John Campbell
Effective Date: 10/22/2009
Completion Date: 4/30/2014

The TRB Joint Subcommittee on “International Human Factors Guideline for Road Systems,” AND10(2), was created to help plan the development of a human factors guideline for road systems that highway designers and traffic engineers could readily use in their work. NCHRP 17-18(8), Comprehensive Human Factors Guidelines for Road Systems was initiated in 2001 and provided the framework for the guideline and two chapters. The project was completed on January 31, 2005.  The summary of results was published as NCHRP Research Results Digest 296, and the revised draft final report is available online as NCHRP Web-Only Document 70.

NCHRP Project 17-31, Human Factors Guidelines for Road Systems--Phase 2 began in August 2005 to develop additional chapters and integrate them with the work completed under Project 17-18(8). The Project 17-31 contractor developed a style guide for the Guideline, refined Chapters 1 through 5 from NCHRP Project 17-8(8), and prepared four new chapters: signalized intersections, unsignalized intersections, work zones, and horizontal curves. Project 17-31 was completed in August 2008. The work completed under project 17-31 has been published as NCHRP Report 600A, Human Factors Guidelines for Road Systems, Collection A: Chapters 1, 2, 3, 4, 5, 10, 11, 13, 22, 23, 26 and NCHRP Report 600B, Human Factors Guidelines for Road Systems, Collection B: Chapters 6, 22 (Tutorial 3), and 23 (Updated).

NCHRP Project 17-41, Human Factors Guidelines for Road Systems - Phase III, started in March 2008 and developed 5 additional chapters. The project was completed and published as NCHRP Report 600C, Human Factors Guidelines for Road Systems - Collection C: Chapters 16, 17, 18, 19, 20, 22 (Tutorials 4, 5, 6), 23 (Updated), 24, 25, 26 (Updated).  This project addresses the final 7 remaining chapters.

The work of this Joint Subcommittee is being coordinated with the development of the Highway Safety Manual being overseen by the TRB Task Force to Develop a Highway Safety Manual (HSM). The first edition of the HSM is expected to be produced after the completion of NCHRP Project 17-36 in January 2009. While the HSM includes one section of a chapter on human factors, it will provide only a broad scope and not include guidelines.

The objective of this project is to complete the development of the Human Factors Guide.

The following tasks will be conducted: (1) literature review, (2) develop a list of topics under each chapter, (3) prepare annotated outline for each guideline, (4) develop draft guidelines, and (5) develop final guidelines.

Status:  This project was completed under NCHRP 17-47 as the final research portion and published in August 2012 as a new complete holistic report under, NCHRP Report 600, Human Factors Guidelines for Road Systems — Second Edition.

The Human Factors Guide (HFG) is intended to be a resource document for highway designers, traffic engineers, and other practitioners. The purpose of the HFG is to provide the best factual information and insight on road users’ characteristics, in a useful format, to facilitate safe roadway design and operational decisions. The impetus behind this effort was the recognition that current design references have limitations in providing the practitioner with adequate guidance for incorporating road user needs and capabilities when dealing with design and operational issues.
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