Pollution-Reducing Highway Barriers: The Road to Validation

A new type of highway barrier is addressing one of the biggest sources of urban air pollution: traffic emissions. By incorporating “pollution-eating” photocatalytic coatings, these barriers break down the harmful compounds created by burning gasoline and diesel, as well as mitigate traffic noise. And because these photocatalysts are activated by sunlight, the barrier’s extra pollution-eating benefit costs nothing to operate. However, as several trials have revealed, simply painting a conventional barrier with a photocatalyst doesn’t work. This article examines the crucial role of aerodynamics, the shortcomings of using titanium dioxide (TiO₂, currently the most common photocatalytic coating), and what it takes to bring emerging alternatives to market.


  • English

Media Info

  • Media Type: Digital/other
  • Features: Figures; Photos; References;
  • Pagination: pp 9-14
  • Serial:
    • TR News
    • Issue Number: 330
    • Publisher: Transportation Research Board
    • ISSN: 0738-6826
  • Publication flags:

    Open Access (libre)

Subject/Index Terms

Filing Info

  • Accession Number: 01764507
  • Record Type: Publication
  • Files: TRIS, TRB, ATRI
  • Created Date: Feb 5 2021 10:06AM