New Specifications for Structural Supports for Highway Signs, Luminaires, and Traffic Signals

In June 2000, American Association of State Highway Transportation Officials (AASHTO) and the Federal Highway Administration (FHWA) agreed on an implementation plan for the design of highway structures utilizing the Load and Resistance Factor Design Methodology (LRFD). As part of that agreement, all new culverts, retaining walls, and other standard structures on which states initiate preliminary engineering after October 1, 2010 shall be designed by the LRFD Specifications. The current edition of the AASHTO "Standard Specifications for Structural Supports for Highway Signs, Luminaires and Traffic Signals" contains small sections that implement the LRFD approach, but the Specification is generally based on the Working Stress design methods. Additionally, design, construction, and inspection language is intertwined in the specification and commentary resulting in a document that is cumbersome and difficult to follow. The entire Specification needs to be converted to the LRFD design approach and reorganized to provide design engineers with a specification that implements the state-of-the-art design approach; separates the design, construction, and inspection criteria into three distinct sections; is consistent with other AASHTO documents; and allows states to meet the above implementation plan. The goals of the proposed research are closely aligned with the grand challenges of optimizing structural systems, advancing the AASHTO specifications and managing knowledge. These were identified in the AASHTO Subcommittee of Bridges and Structures report "Grand Challenges: A Strategic Plan for Bridge Engineering" published in June, 2005. The objective is to develop a new edition of the AASHTO "Standard Specifications for Structural Supports for Highway Signs, Luminaires and Traffic Signals" based on the LRFD methodologies. The resulting Specification would also be logically arranged with distinct sections for design, construction, and inspection/maintenance. Inspection of these structures has not been codified in the past; this is an excellent opportunity to address this issue. The successful completion of this research is expected to improve the safety and reliability of structural supports nationwide. Agencies will be in a better position to meet the LRFD implementation plan, and the provisions will facilitate the design, construction, inspection, and maintenance of their structural supports for highway signs, luminaries and traffic signals. The probability-based specification will result in structures that are based upon a more uniform set of design criteria. Some structures may be more expensive; however, some may be less. The specification will promote quality construction/fabrication practices and it will also address the current shortcoming of inspection and maintenance or these non-redundant ancillary structures. The combination of these efforts will allow agencies to better assess, manage, and maintain these transportation assets.<div></div>


  • English


  • Status: Active
  • Contract Numbers:

    Project 10-80

  • Sponsor Organizations:

    Federal Highway Administration

    1200 New Jersey Avenue, SE
    Washington, DC  USA  20590

    American Association of State Highway & Transportation Officials

    444 North Capitol Street, NW, Suite 225
    Washington, DC    20001

    National Cooperative Highway Research Program

    Transportation Research Board
    500 Fifth Street, NW
    Washington, DC  USA  20001
  • Project Managers:

    Dekelbab, Waseem

  • Performing Organizations:

    BridgeTech, Incorporated

  • Principal Investigators:

    Puckett, Jay

  • Start Date: 20100521
  • Actual Completion Date: 20121121
  • Source Data: RiP Project 22351

Subject/Index Terms

Filing Info

  • Accession Number: 01464201
  • Record Type: Research project
  • Source Agency: National Cooperative Highway Research Program
  • Contract Numbers: Project 10-80
  • Files: TRB, RiP, USDOT
  • Created Date: Jan 3 2013 2:38PM