These Web sites offer much additional information on the use and benefits of roundabouts.
NDOT Presentation on SR 227 Spring Creek Roundabout
Regional Transportation Commission of Washoe County (Reno, NV.)
Federal Highway Administration roundabout brochure
Roundabout Q + A – Insurance Institute for Highway Safety
Safety characteristics of modern roundabouts - Federal Highway Administration article
Las Vegas Review-Journal Roundabout Article, March 2009
Roundabout overview from Alaskan engineering firm



