Update of the Policy on Geometric Design of Highways and Streets Guidance on Acceleration/Deceleration and Stopping Sight Distance Criteria

In September 2018, the American Association of State Highway and Transportation Officials (AASHTO) published the 7th edition of A Policy on Geometric Design of Highways and Streets (also known as the 2018 Green Book). The 2018 Green Book provides guidance for determining geometric design criteria of roadways, including guidance on acceleration/deceleration and stopping sight distance criteria. Acceleration/deceleration is influenced by many factors (e.g., grade, vehicle type, and maneuver type). Stopping sight distance is influenced by many factors (e.g., perception reaction time, object height, and driver's eye height). In addition, the recent changes in vehicle fleet, vehicle technology, and driver population impact the design criteria. Research is needed to identify the limitations of the 2018 Green Book guidelines for acceleration/deceleration and stopping sight distance criteria, develop improved guidelines, and recommend changes to the 2018 Green Book for consideration and adoption by AASHTO. Improved guidance could result in reduced environmental impacts, savings in construction costs, and reductions in construction time. The objective of this research is to update the guidelines for acceleration/deceleration and stopping sight distance criteria contained in the 2018 Green Book.

• Record URL:
  http://apps.trb.org/cmsfeed/TRBNetProjectDisplay.asp?ProjectID=4764

Language

• English

Project

• Status: Completed
• Funding: $500000
• Contract Numbers:

  Project 15-75

• Sponsor Organizations:

  National Cooperative Highway Research Program

  Transportation Research Board
  500 Fifth Street, NW
  Washington, DC  United States  20001

  American Association of State Highway and Transportation Officials (AASHTO)

  444 North Capitol Street, NW
  Washington, DC  United States  20001

  Federal Highway Administration

  1200 New Jersey Avenue, SE
  Washington, DC  United States  20590
• Project Managers:

  Hanna, Amir

• Performing Organizations:

  Michigan State University, East Lansing

  East Lansing, MI  United States  48824
• Principal Investigators:

  Savolainen, Peter T

• Start Date: 20200901
• Expected Completion Date: 20230630
• Actual Completion Date: 20230630

Subject/Index Terms

• TRT Terms: Acceleration (Mechanics); Deceleration; Drivers; Geometric design; Guidelines; Highway design; Reaction time; Recommendations; Stopping sight distance; Vehicle design
• Identifier Terms: AASHTO Green Book
• Subject Areas: Design; Highways; Policy; Vehicles and Equipment;

Filing Info

• Accession Number: 01707709
• Record Type: Research project
• Source Agency: Transportation Research Board
• Contract Numbers: Project 15-75
• Files: TRB, RIP
• Created Date: Jun 8 2019 5:14AM