20th Ave. & Harlan St.

Edgewater, CO


To address multimodal safety, mobility, and vehicular performance, the city of Edgewater retained MTJ to evaluate the feasibility of a compact-style roundabout at this commercial, highly constrained intersection.


Alternative concepts addressed these key issues:

  • Minimize/avoid undesirable ROW impacts to surrounding properties
  • Ensure compatibility with existing and/or proposed roadway cross sections, to include ped and bike design features – cycle track and on-street bike facilities
  • Accommodate necessary design vehicles:
    • Large trucks/freight
    • Transit and school buses
    • Emergency response/fire trucks

Two alternatives were developed to evaluate optimal size/shape and fit with acceptable impacts. The resulting optimal design was a non-circular 107’ x 95’ ICD compact-style roundabout. The compact-style design allows the central island to retain landscape features that will promote visual conspicuity for this application.


  • Minimized undesirable ROW impacts to surrounding properties
  • Compatible with existing roadway cross sections, providing optimal pedestrian/ bicycle accommodations
  • Accommodated large trucks, transit/school buses, emergency response vehicles
  • Non-circular compact-style roundabout

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