Proposed AASHTO Guidelines for Implementation of MASH for Sign Supports, Breakaway Poles, and Work Zone Traffic Control Devices

NCHRP Project 22-43: Implementation of MASH for Sign Supports, Breakaway Poles, and Work Zone Traffic Control Devices (Completed): the objective of this research is to develop guidelines for implementation of, and propose modification to, AASHTO MASH for sign supports, breakaway poles, and work zone traffic control devices, including examples to demonstrate the application of the proposed guidelines. NCHRP Project 17-105: MASH Crashworthiness of Luminaire Poles (Research in Progress): there are two objectives: (1) determine the maximum height and weight of breakaway poles and hardware that will meet MASH requirements and (2) investigate if the criterion of a 4-inch-tall object on a 5-foot chord is appropriate for the current vehicle fleet. Research efforts for Objective 1 will include: (1) physical tests to correlate roof crush with pole and hardware height and weight and aid in determining critical pole configurations, and (2) dropping poles with associated hardware of varying heights and weights onto vehicles as a precursor to full-scale crash testing. The findings will be used to identify improvements to vehicle computer models to better simulate crash testing roof crush. Research efforts for Objective 2 will: (1) review procedures used to develop the 4-inch-tall object on a 5-foot chord criteria, (2) determine if the procedure can be improved, and (3) analyze procedures with a current vehicle fleet. Results from this research may help guide future improvements to MASH, the Roadside Design Guide, and other AASHTO documents. 

• Record URL:
  http://apps.trb.org/cmsfeed/TRBNetProjectDisplay.asp?ProjectID=4775
• Supplemental Notes:
  • NCHRP Projects 22-43 and 17-105 are combined. NCHRP Project 22-43 is completed, and research is underway for NCHRP Project 17-105.

Language

• English

Project

• Status: Active
• Funding: $1099208
• Contract Numbers:

  Project 22-43

• 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:

  Turner, Anne-Marie

• Performing Organizations:

  University of Nebraska, Lincoln

  1400 R Street
  Lincoln, NE  United States  68588
• Principal Investigators:

  Pajouh, Mojdeh

• Start Date: 20200813
• Expected Completion Date: 20260630
• Actual Completion Date: 0

Subject/Index Terms

• TRT Terms: Breakaway supports; Cost effectiveness; Crashworthiness; Guidelines; Manuals; Roadside structures; State departments of transportation; Support poles; Test procedures; Traffic signs; Work zones
• Subject Areas: Bridges and other structures; Highways; Operations and Traffic Management; Safety and Human Factors;

Filing Info

• Accession Number: 01707553
• Record Type: Research project
• Source Agency: Transportation Research Board
• Contract Numbers: Project 22-43
• Files: TRB, RIP
• Created Date: Jun 5 2019 1:29PM