State Hwy. 61 & Jamaica Ave.

Cottage Grove, MN

MTJ Roundabout Engineering provided peer review and geometric services for the final operational/capacity analysis, laneage requirements, and final horizontal geometrics optimization for this complex system of roundabout interchanges.

MTJ’s work effort included analysis of the 6-leg roundabout versus two closely-spaced roundabouts, and was one of the first interchange roundabouts in the state of Minnesota.


  • Flared entry
  • Spiral design
  • Interchange
  • Accommodates large trucks


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