STH 175 & STH 167 (Holy Hill Rd.)

Germantown, WI

MTJ Roundabout Engineering provided the roundabout analysis, design, peer review for 30/60/90% plans, and public outreach support to WisDOT, as a sub-consultant to Westbrook Engineering. This challenging roundabout project includes high-speed approaches in a transitional/exurban setting.

Key to this effort was developing a design that was sensitive to ROW impacts replacing an existing twoway stop, while allowing safe residential drives to exist to ensure safety and access for all modes of travel. MTJ played a pivotal role in achieving the correct roundabout design solution and acceptance of this unique roundabout application.


  • Ex-urban/transitional context
  • High-speed approaches
  • OSOW accommodations
  • School nearby/ped safety