Research for AASHTO Standing Committee on Highways. Task 374. Guidelines for Selecting Sign Sheeting Materials for AASHTO M268

There are two standard specifications for sign sheeting materials in the United States: AASHTO M268 and ASTM D4956. The AASHTO specification is based more on nighttime driver needs and the ASTM specification is based mostly on the performance of different products. While both specifications classify sign sheeting materials, neither specification provides guidance to help agencies select the appropriate sign sheeting materials. ASTM D4956 is more of a product based specification while AASHTO M268 is more of a performance based specification. The AASHTO M268 specification was developed by a team of state DOTs so that sign sheeting materials can be classified in a meaningful way. Research is needed to develop guidelines for M268 for selecting the most appropriate sign sheeting materials. The objective of this project is to develop guidance that can be used by highway agencies in the process for selecting sign sheeting materials using AASHTO M268. This guidance addresses current regulations, driver needs, the latest human factors research, cost, availability, durability, ease of use, maintenance, sign type, typical placement and other relevant factors. The research includes a critical review of previous research related to sign sheeting materials and their effectiveness, identify and evaluate the process currently used for selecting sign sheeting materials, and develop guidelines. The guidance describes the types of sign sheeting materials, the specific design conditions where they perform best, and develops scenarios for sheeting type use for specific sign locations according to driver needs. The guidance recommends sign sheeting types for sign design, location, and placement while taking into account the retroreflectivity of various sign sheeting types and economics.

• Record URL:
  http://apps.trb.org/cmsfeed/TRBNetProjectDisplay.asp?ProjectID=3920

Language

• English

Project

• Status: Completed
• Funding: $75000
• Contract Numbers:

  Project 20-07, Task 374

• Sponsor Organizations:

  Federal Highway Administration

  1200 New Jersey Avenue, SE
  Washington, DC  United States  20590

  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
• Project Managers:

  Deng, Zuxuan

• Performing Organizations:

  Texas A&M Transportation Institute, College Station

  Texas A&M University System
  3135 TAMU
  College Station, TX  United States  77843-3135
• Principal Investigators:

  Hawkins, Gene

• Start Date: 20171001
• Expected Completion Date: 20220331
• Actual Completion Date: 20220331
• Source Data: RiP Project 39464

Subject/Index Terms

• TRT Terms: Costs; Design; Durability; Guidelines; Location; Materials selection; Retroreflectivity; Sign sheeting; State departments of transportation
• Subject Areas: Design; Highways; Materials; Operations and Traffic Management;

Filing Info

• Accession Number: 01560527
• Record Type: Research project
• Source Agency: Transportation Research Board
• Contract Numbers: Project 20-07, Task 374
• Files: TRB, RIP
• Created Date: Apr 16 2015 1:00AM