Why Carmel’s Plan to Improve Keystone Avenue is the Best Solution!
The Indiana Department of Transportation (INDOT) had plans to add a third lane in each direction along Keystone Avenue and the addition of numerous turn lanes at each of the intersections during the summer of 2008. While such a project would have provided temporary relief to the current congestion, it would not have provided a long-term solution to the capacity issues for the corridor and the local street network. By lowering Keystone Avenue and providing roundabout interchanges at each major cross street, the City of Carmel can provide safer intersections and increased mobility for its citizens and visitors. In addition, facilities are being added to eliminate the barrier Keystone Avenue has historically represented to pedestrian traffic.

The rendering on the left represents properties affected by a traditional intersection design and those marked in red would be in the right of way of the tight diamond interchange. The rendering on the right shows the proposed roundabout design which impacts a much smaller footprint.

Intersection Comparison:
 106th Street
 126th Street