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Arizonans face increasing pavement maintenance needs.
What can be done to fix Arizona’s freeways?

In this video, Thomas Van Dam, Ph.D., P.E.; Principal, NCE discusses the fact that diamond grinding refreshes the pavement's ability to capture carbon by reopening the pore structure and creating more surface area.

  • Existing asphalt rubber is wearing down, and the Arizona Department of Transportation (ADOT) has been actively exploring options for creating smooth, quiet pavements along Valley freeways.

  • Concrete pavement was the preferred solution when our roads were built, chosen for its durability and long life. Diamond grinding makes it smooth and quiet.

  • Switching to diamond-ground concrete requires $3.9 billion less tax dollars (over 30 years). Diamond-ground concrete is also cooler, more sustainable, and provides longer-lasting service than asphalt rubber.

  • Citizens were never afforded the opportunity to compare diamond grinding to asphalt rubber when a political decision was made to use rubber. But you can experience it today and make your own decision!

Map of Phoenix area with diamond ground sections marked
  • In the early 2000s, ADOT investigated roadway noise and recommended concrete surfaces. Their investigation also accurately predicted the increase in asphalt rubber noise levels over time.

  • Concrete minimizes disruption due to maintenance. Diamond grinding would only be done once during a 30-year time frame, while the entire highway would need to have asphalt rubber removed and replaced twice during this period. In addition, periodic maintenance of asphalt rubber would occur in between. These activities cause traffic congestion, accidents, and loss of commuter time.

  • The recently diamond-ground Price Road 101 section now has 20-25% more capacity than the section with asphalt rubber and generates the same or less noise.

  • Concrete roads are constructed from local materials by local tradespeople.

We encourage you to be part of the
decision-making process for your community!

The Coalition for Responsible Roads is focused on civic engagement, not on the political process or any given party/candidate. We provide a platform for good stewards of the community who support a sound infrastructure investment in Arizona and oppose wasteful and unnecessary spending.

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