Center for Transportation Research and Training

Links to Related Sites

Check the following roundabout links!: http://www.alaskaroundabouts.com/MVC-001V.MPG
http://www.dublin.oh.us/city/deptdev/engineer/roundabouts/index.html http://members.cox.net/near/NewEngland.htm#Vermont

New York State DOT Website on Modern Roundabouts: Also check the following roundabout link!
http://www.dot.state.ny.us/roundabouts/files/insurance_report.pdf
Check this file for List of Roundabouts at Schools in USA
Analysis of a Road Diet Conversion and Alternative Traffic Controls


Check the following Roundabout Manual Links from WIS DOT: WIS DOT ROUNDABOUT DESIGN GUIDE CHAPTER 1
WIS DOT ROUNDABOUT DESIGN GUIDE CHAPTER 5
WIS DOT ROUNDABOUT DESIGN GUIDE CHAPTER 10
WIS DOT ROUNDABOUT DESIGN GUIDE CHAPTER 15
ROUNDABOUT DESIGN FOR CAPACITY AND SAFETY - THE UK EMPIRICAL METHODOLOGY
Evolution of Roundabout Technology: A History-Based Literature Review (Author-Edmund Waddell)
Roundabout Rule(s)-Less Complicated Than Signals
Pedestrain Crosswalk Signals at Roundabouts: Where are they Applicable?
FHWA Publication on Roundabouts: Check the following roundabout link!
http://www.fhwa.dot.gov/resourcecenter/teamsafe_rndabout.pdf
New Roundabout Calenders from UK: Check the following roundabout calendar link!
http://www.roundaboutsofredditch.co.uk/home.html
Nort East Area Roundabouts Website: This website is dedicated to Roundabout Construction in the northeast. It has a collection of Internet references related to Roundabout issues & design criteria. Check the website for more information!
http://www.nearoundabouts.org/
Traffic Calming Homepage - Portland, Oregon: City of Portland Transportation - Traffic Calming: How it works, Traffic Calming Devices, Project Evaluations, Traffic Calming & the Law, Current & Future Projects, New Traffic Calming Research, Studies & Reports, Photo Albums, etc.
http://www.trans.ci.portland.or.us/Trafficcalming/default.htm
PUBLIC ROADS (Autumn 1995) - ROUNDABOUTS (page 1): All images of British and Australian roundabouts have been deliberately reversed to show right-side driving so that most Public Roads readers can better comprehend the traffic pattern within the roundabout. Roundabout...
http://www.tfhrc.gov/pubrds/fall95/p95a41.htm
Modern Roundabouts: Cover. A two-lane/one lane roundabout in Hilton Head South Carolina. Constructed in 1996 as a gateway into the Hilton Head Plantation as an alternative to traffic signal control
http://www.roundabouts.net/newpage3.htm
Modern Roundabouts - the Web Site: This Web site serves as one of the definitive sources on Modern Roundabouts and is a complement to a Federal Highway Administration research project aimed at developing a comprehensive guide to roundabouts design
http://roundabout.kittelson.com/
Modern Roundabouts - Resources: This table cross-references the applicable sections from currently available design references with the chapters and sections from the proposed FHWA Roundabout Design Guide
http://roundabout.kittelson.com/resources.html
Roundabouts: aaSIDRA is suitable for single-lane and multi-lane roundabouts with up to eight legs, including one-way approach or exit conditions, slip lanes, continuous lanes, and short lanes
http://www.aatraffic.com/SIDRA/roundabouts.htm
ROUNDABOUTS and TRAFFIC CIRCLES: Southern Intersection of BA and Route 109 Before Modification
http://www.abnaengineering.com/abna/index.htm

RoundaboutsUSA - Park City, UT Roundabouts: There are currently three roundabouts planned and/or under construction in Park City, UT. One of the roundabouts is located at the intersection of Deer Valley Drive and Marsac Avenue near Old Town. The other two roundabouts are at the front and rear entry of the Factory Stores outlet mall at Park City. Click the thumbnail for a bigger picture
http://www.roundaboutsusa.com/parkcity.html

RoundaboutsUSA - Provo, UT Roundabouts: Provo, Utah has a number of existing roundabouts with several more planned for the near future. Click the thumbnail for a bigger picture
http://www.roundaboutsusa.com/provo.html
RoundaboutsUSA - Riverdale, Utah Roundabouts: Two 180' ICD Roundabouts.In summer of 2001-Riverwood Drive (700 West
http://www.roundaboutsusa.com/riverdale.html
Roundabouts USA - Orem, UT Roundabouts: Orem, Utah has a number of existing roundabouts with several more planned for the near future. Click the thumbnail for a bigger picture
http://www.roundaboutsusa.com/orem.html
Roundabouts USA - St. George, UT Roundabouts: St. George has a new five-leg roundabout by the old post office on Main Street. Look for new St. George roundabouts in the near future. Click the thumbnail for a bigger picture
http://www.roundaboutsusa.com/stgeorge.html

Roundabouts USA - Tooele Roundabouts: Tooele, Utah, Roundabouts Roundabout near Jack's In Overlake, 2000 North Roundabout near Jack's In Overlake, 2000 North Roundabout near Jack's In Overlake, 2000 North Introduction | History | Design | Links | Contact Us | Home
http://www.roundaboutsusa.com/tooele.html
Roundabouts USA - Draper Roundabouts: Draper, Utah, Roundabouts South Mountain Roundabout with horse trail underpass New Draper roundabout, 13th East Pioneer Road Introduction | History | Design | Links | Contact Us | Home
http://www.roundaboutsusa.com/draper.html

Lane markings on roundabouts: In Hong Kong the Transport Department (which is responsible for road signage amongst other things), started painting lane markings on roundabouts. These markings are continuous circles of broken white lines around the central island. Towards the end of last year an acquaintance, who was driving around the Hoi Hing Road roundabout in Tsuen Wan for third exit (i.e. turning right), was struck by an overtaking car on his nearside when he started to steer left for his exit i.e. when he was halfway around the roundabout. He has now been prosecuted by police for 'careless driving' on the basis that
http://www.hongkongclaims.com/wwwboard/messages/3.html

Traffic Calming .Org - Roundabouts: Roundabouts require traffic to circulate counterclockwise around a center island. Unlike traffic circles, roundabouts are used on higher volume streets to allocate rights-of-way among competing movements
http://www.trafficcalming.org/ROUNDABOUTS.html

British Highway Code for Roundabouts: British Highway Code for Roundabouts These are the official instructions taken from the British Highway Code (1998) on Roundabouts and reformatted for the web. Thanks to Gordon Kemp at PRIDE motorcycle training for this update from the U.K
http://www.esmerel.com/wagons/rhodes/britcode.html

Alternate Street Design, P.A.

Alternate Street Design, P.A. provides professional street design consulting services. We special in finding solutions to the toughest of traffic challenges. No challenge is too big or tough to solve.
http://www.roundabouts.net/

Roundabouts: White Paper: Improved traffic flow, aesthetics, and cost savings make roundabouts a good idea, and the safety gains are compelling (Status Report, May 13, 2000).
http://www.aaafoundation.org/resources/index.cfm?button=roundabouts

ROUNDABOUTS and TRAFFIC CIRCLES: Large (300’+) Fast 30 to 50 mph Scary High speed merge Smaller < 180’ Slow 10 – 25 mph Safer Yield at entry Previous slide Next slide Back to first slide View graphic version
http://www.abnaengineering.com/abna/tsld003.htm

Crossings and Roundabouts: As a 2-level crossing (alternative B). There is, however, an interesting solution to the problem of letting 2 beams cross each other on the same level. We present that solution a bit down on this page. Both of the alternatives above have both advantages and drawbacks. The shunt does not require sloping beams (to achieve different levels), and enables the cars to change direction by switching onto the other beam, if required. But at least one of the beams will need curves, which reduces speed. The 2-level crossing provides for high speed on both beams, and does not require timeslotting, since
http://www.swedetrack.com/e37cross.htm

Roundabouts: More Than Just a Traffic Circle: In many parts of the world, notably the United Kingdom and Australia, modern roundabouts are common intersection control devices. They are slowly gaining acceptance in some parts of the United States. Part of the resistance to implementation of roundabouts in this country is the perception that they have the same characteristics as rotaries. Massachusetts is currently removing rotaries and replacing them with signalized intersections because of the inherent problems with a rotary's operation
http://www.universaleng.com/news&views/feb00.html

Roundabout Information Page: The purpose of this page is to provide information on ODOT�s current research, guideline development and implementation of roundabout designs.
http://www.odot.state.or.us/techserv/engineer/pdu/Roundabout.htm

NCHRP Anticipated Project: Although traffic circles have been used in the United States since 1905, their use has been limited since the 1950s because they were found to work neither efficiently nor safely. The modern roundabout was developed
http://www4.nationalacademies.org/trb/crp.nsf/

3-day training course "Using aaSIDRA for Roundabout / Intersection Analysis": This course was held in Las Vegas (31 Jul - 2 Aug 2001) run by Akcelik & Associates Pty Ltd. in association with City of Las Vegas
http://www.akcelik.com.au/SIDRA/LasVegas_Course_Aug01.htm
Parsons Brinckerhoff roundabout page from Peter Doctors: This page brought to you by Parsons Brinckerhoff the leader in Transportation Engineering in the world.
http://www.roundabouts.com/
City of Delray Beach, Florida website: What Is A Roundabout? Roundabouts are small raised islands placed in the middle of an intersection. They are typically landscaped with ground cover and street trees. Roundabouts require drivers to slow to a speed that allows them to comfortably maneuver around them. Roundabouts are often called traffic circles, but there is a definite difference between a roundabout and a traffic circle.
http://www.delrayesd.com/roundabouts.htm
Ourston Roundabout Interchanges: Ourston Roundabout Engineering is a corporation devoted exclusively to the design of modern roundabouts. We have designed the first three modern roundabout interchanges in North America. We have led the Roundabout Revolution in America with several design accomplishments:
http://www.ourston.com
Dowling Associates Paramics Traffic Simulation: Dowling Associates has been working closely with Quadstone LTD, the developers of Paramics for over three years. We will post some images and animations from some of our Paramics project work here.
http://www.dowlinginc.com/pages/paramics.html
University Of Florida Transportation Research Center: About the TRC People Research Projects Educational Programs and Opportunities Transportation Service Centers Other Transportation Sites University of Florida Department of Civil & Coastal Engineering Other UF Servers
http://uftrc.ce.ufl.edu/