Washington County 175th Avenue/Kemmer Road Intersection Improvements, OR

Quick Facts

  • A roundabout was selected as the preferred intersection control treatment based on an intersection control evaluation traffic study and input from the public

  • The project was funded through the Washington County MSTIP Bonding Cost-sharing program

  • The roundabout was designed to allow for the future addition of right turn lanes when needed


  • The roundabout addresses peak hour performance needs based on surrounding land use traffic patterns

    • Reduces vehicle queuing along 175th Avenue
  • Improves pedestrian and bicycle circulation through the intersection to connection sidewalks and regional trails

  • Improves intersection safety

Our Work

  • Led transportation planning services to forecast future traffic volumes and intersection needs based on land use in the surrounding area

  • Performed intersection control evaluation to determine the recommended intersection control treatment

  • Developed final plans, specifications, and engineering estimates for lighting, signing, and striping

  • Provided engineering support during project construction

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