Greenroads: A Sustainability Performance Metric for Roadway Design and Construction

Greenroads is a performance metric for quantifying sustainable practices associated with roadway design and construction. Sustainability is defined as having seven key components: ecology, equity, economy, extent, expectations, experience and exposure. By Greenroads standards, a sustainable roadway project is one that carefully and overtly integrates these components into the design and construction process to a substantially higher standard than current common practice. Greenroads Version 1.0 consists of 11 Project Requirements, 37 Voluntary Credits (worth 108 points) and up to 10 points worth of Custom Credits. Project-level sustainability performance can be assessed by meeting all Project Requirements and any number of Voluntary Credit points. Greenroads also sets “achievement levels” at different point values in order to provide recommended scoring levels. Greenroads is compatible with other existing systems that can and have been applied to roadways and can be adopted in a number of ways, however, the most likely are: (1) as an external standard, (2) as a project accounting standard, and (3) as a tool for competitive advantage for both private industry and public agencies.

  • Record URL:
  • Supplemental Notes:
    • This research was sponsored by the U.S. Department of Transportation, University Transportation Centers Program.
  • Corporate Authors:

    TransNow, Transportation Northwest

    University of Washington, Department of Civil Engineering
    129 More Hall, Box 352700
    Seattle, WA  United States  98195-2700

    Washington State Department of Transportation

    Research Office, Transportation Building, MS 47372
    Olympia, WA  United States  98504-7372

    Research and Innovative Technology Administration

    1200 New Jersey Avenue, SE
    Washington, DC  United States  20590
  • Authors:
    • Muench, Stephen T
    • Anderson, Jeralee L
  • Publication Date: 2009-12


  • English

Media Info

  • Media Type: Web
  • Edition: Final Technical Report
  • Features: Appendices; Figures; References; Tables;
  • Pagination: 67p

Subject/Index Terms

Filing Info

  • Accession Number: 01152762
  • Record Type: Publication
  • Report/Paper Numbers: TNW2009-13, WA-RD 725.1
  • Contract Numbers: DTRT07-G-0010 (Grant)
  • Created Date: Mar 18 2010 3:02PM