what we do

Roadway and Highway Design

Designing infrastructure to safely and efficiently move people and goods

Providing safe and efficient roads and highways is more challenging today due to limited funding and increasingly complex regulatory processes. Parametrix works with clients to develop solutions that are cost effective and minimize disruption to users and the environment. We incorporate LID, green streets, and complete streets principles to create appealing, safe, and sustainable transportation right-of-ways.

Idaho 16, US 20/26 | Parametrix
Idaho 16, US 20/26 to Idaho 44 
Boise, Idaho
Client: ITD

This 2-mile extension is the first step in extending Idaho 16 south in the Treasure Valley. Ultimately, ITD will connect Idaho 16 to I-84 to accommodate development in western Ada County and eastern Canyon County. Parametrix led the project team to deliver this fast-tracked project. The project involves designing a new four-lane highway, bridges across the Boise River and Phyllis Canal, at grade signalized intersections at US 20/26 and SH 44, consolidating access, and adding 5 miles of new local roads.

  • Project of the Year, Idaho Business review, 2015
  • Project of the Year Over $10M, ASCE Section 8, 2015 
  • National Recognition Award, ACEC 2015
  • Project of the Year, ASCE Southern Idaho Section, 2015
  • 1st Place - Transportation, ACEC Idaho, 2015


  • US 550, NM 313 to NM 528

    I-40 Reconstruction

  • Empire Corridor Improvements

    Empire Corridor Improvements

  • US 12 and 21st Street Intersection

    US 12 and 21st Street Intersection

  • Mogollon Reconstruction | Parametrix

    NM 159 Drainage and Roadway Reconstruction

  • Powell Butte Highway Roundabout | Parametrix

    Powell Butte Highway Roundabout

  • I-5 Mounts Road to Thorne Lane

    I-5 Mounts Road to Thorne Lane Improvements