Highly Modified Asphalt Mixtures

WTRC plans and convenes subject matter expert (SME) topical discussions on issues of high interest to its members. These online sessions feature presentations and Q&A panels that include experienced agency practitioners, leading researchers, and industry experts.

During online sessions held February 2 and February 4, 2026, SME presenters shared challenges, successes and best practices related to highly modified (HiMod) asphalt. Day 1 focused on binders and mix design, and day 2 focused on construction.

Recordings and presentations follow. For recordings, use right/left arrow keys to skip back or forward five seconds.

Day 1 – Binders and Mix Designs – February 2, 2026

Opening Remarks

Presentation start times:

  • Howard Anderson, Utah DOT – Starts at 0:00
  • Reed Ryan, Asphalt Institute, Welcome and Introduction – Starts at 0:50 | Download Presentation

Binders and Mix Designs – Presentations

Presentation start times:

  • Howard Anderson, Utah DOT, Update on UDOT’s Highly Modified Asphalt Implementation – Starts at 0:00 | Download Presentation
  • Jhony Habbouche, Asphalt Institute, High Polymer Modified Asphalt Binders and Mixtures: Virginia DOT Case Study – Starts at 25:47 | Download Presentation

Transportation Agency Panel/Q&A

Panel Members

  • Howard Anderson, Utah DOT
  • Dave Johnson, Asphalt Institute 
  • Gisel Carrasco, Texas DOT

Industry Panel/Q&A

Panel Members

  • Dave Zhai, Idaho Asphalt Supply
  • Mo Rahman, Ergon
  • Craig Fabrizio, Staker Parsons
  • Ryan Proctor, Suncor

Day 2 – Construction – February 4, 2026

Opening Remarks

Presentation start times:

  • John Arambarri, Idaho TD – Starts at 0:00
  • Dave Johnson, Asphalt Institute, Welcome and Introduction – Starts at 1:20 | Download Presentation

Construction – Presentations

Presentation start times:

  • Buzz Powell, Asphalt Pavement Alliance, Highly Modified Asphalt Mixtures: Construction – Starts at 0:00 | Download Presentation
  • Jim Musselman, Florida DOT, Florida’s Experiences with Highly Modified Asphalt Mixtures – Starts at 9:30  | Download Presentation
  • Jhony Habbouche, Asphalt Institute, High Polymer Modified Asphalt Binders and Mixtures: A Strategic Look at Gaps and Implementation Opportunities Mixtures – Starts at 32:11 | Download Presentation

Transportation Agency-Industry Panel/Q&A

Panel Members

  • Jared Dastrup, Utah DOT
  • Jonas Staker, Staker Parson
  • Dave Johnson, Asphalt Institute