STH 61 and Jamaica Ave. Roundabouts

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.

Highlights

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

 

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