Mini but Mighty
A good roundabout design is not just utilizing sound design principles, but knowing how it feels when driving through it.
This mini roundabout in Shakopee, MN is the first mini roundabout in the U.S. with high speed approach treatments and cuvilinear alignments to slow traffic prior to reaching the entry radii. The design is a direct correlation to the concepts RTE produced for the FHWA Mini Roundabout Guidelines. The constructed project results in a gradually slowing approach roadway coupled with smooth entry radii for harmonious entry speeds on all four legs. Scott County / City of Shakopee found this alternative superior to a signal or stop control for improved safety and capacity during peak traffic demands. The mini roundabout also improves sidewalk / trail connections and avoids impacts to adjacent private property.
urban Mini rOUndaBOUts
You can’t rely on people coming to downtown… you must create a “sense of place”… a lively, pedestrian friendly, “village” style community people want to be!
The purpose of this project was to restore life into the Historic Downtown Business District of Oroville, CA. It entailed replacing its urban one-way street couplet back to its original bi-directional flow with improved intersection capacity using mini roundabouts developed by RTE. The plan provided streetscape improvements that enhance pedestrian safety, create a more vibrant mulit-modal experience, and provide design elements that bring continuity to the downtown area.
The project included nine mini roundabouts, a five-leg gateway roundabout, share-the-lane bike paths, transit stops, multiple styles of on-street parking, and access management for the Historic Downtown area. The plan also included new civic centers, encouragement of diversity in commerical uses, zero building setbacks, increased sidewalk widths for outdoor seating, dining, and landscaping.
SEE PROJECT PLAN
Future of the mini
The key to any roundabout, especially the mini, is to ensure there is adequate speed control (deflection). Without it, the intersection is unsafe!
This mini roundabout was installed to resolve the relatively high volume of traffic between Historic Route 66 and adjacent collector roadways serving several regional school systems, local businesses, recreation centers, and mixed use residential areas in Flagstaff, AZ. The project exemplifies the flexibility of use of the mini roundabout being applied in mixed use areas, commercial and residential zones, as well as public schools and community centers.
The future of the mini roundabout is highly anticipated as a limitless resource to confidently resolve local congestion, improve pedestrian and cyclist safety, reduce vehicular accidents, and improve town character.