The following is a list of informative websites on modern roundabouts:

http://azdot.gov/ccpartnerships/roundabouts/index.asp

http://www.iihs.org/research/qanda/roundabouts.html

http://safety.fhwa.dot.gov/intersections/col_roundabouts.htm

http://www.roundaboutsusa.com

http://www.save41.org/roundabouts/faqs.htm

http://www.fhwa.dot.gov/resourcecenter/teams/safety/safe_7rnd.cfm

http://www.odot.state.or.us/techserv/engineer/pdu/roundabouts/Rndbtindex.htm

http://www.wsdot.wa.gov/Projects/roundabouts/

http://www.sha.state.md.us/safety/oots/roundabouts/index.asp

http://www.dot.state.ny.us/roundabouts/round.html

http://www.co.honolulu.hi.us/dts/roundabout/index1.htm

http://www.ourston.com

http://www.ksu.edu/roundabouts/