Roundabouts
Roundabouts are a Proven Safety Countermeasure because they can substantially reduce crashes that result in serious injury or death. Roundabouts can:
- Improve safety
- Promote lower speeds and traffic calming
- Reduce conflict points
- Lead to improved operational performance
- Meet a wide range of traffic conditions because they are
versatile in size, shape, and design
Outreach and Education Resources
- Roundabout Rules Video
- Roundabout Rules PDF
- Roundabouts Public Service Announcement –
- Modern Roundabouts: An Innovative Solution to Intersection
Safety Concerns – Video - Modern Roundabouts: A Safer Choice
- Table Top or Floor Decal Educational Illustration of Multilane
Roundabout - National Roundabouts Week web page (#RoundaboutsWeek)
- Roundabouts with Pedestrians and Bicycles – A Safe Choice for Everyone
- Roundabouts and First Responders – Saving Lives Together
- Roundabouts along Rural Highways
- Roundabouts and Tribal Governments
- Carmel, IN, Engages the Public through Print and Web Outreach
- Washington County, MN, Educates Drivers through "Roundabout U"
- Washington State Focuses on Outreach, Illustrates How to Drive a Roundabout
- Bend, OR, Teaches through Children Using Coloring Books to Communicate about Roundabouts
- Missouri DOT Convinces Skeptics That Roundabouts Work
- Iowa DOT Provides "Expert–on–Hand" Technical Assistance to Promote Roundabouts
- Virginia DOT's Roundabouts Review Committee Spearheads Outreach Efforts
- Brown County, WI, Roundabouts Calm Traffic, Improve School Zone Safety
- Clearwater, FL, Public Charrettes Produce Strong Support for Roundabouts
- Sioux Falls, SD, Conducts Roundabout Rodeo
- Washington State DOT Hosts Roundabout Rodeo
- Montpelier, VT, Constructs Roundabout with Local Roundabouts Steering Committee
- Madison, WI, Makes Roundabouts Work for Pedestrians and Bicycles
- Wisconsin DOT Engages Freight Stakeholders in the Roundabout Design Process
- Santa Cruz, CA, Chooses a Roundabout as a Multimodal Solution
- Austin, TX, Hosting General Information Briefings to Promote Roundabouts
- Kansas DOT Designing Roundabouts for Truck Traffic
Technical Materials and Research
- Guide for Roundabouts (NCHRP Report 1043)
- Turbo Roundabout
- Accelerating Roundabout Implementation in the United States
- Volume I – Evaluation of Rectangular Rapid-Flashing Beacons (RRFB) at Multilane Roundabouts – Final Report
- Volume II – Assessment of Roundabout Capacity Models for the Highway Capacity Manual – Final Report
- Volume III – Assessment of the Environmental Characteristics of Roundabouts – Final Report
- Volume IV – Review of Fatal and Severe Injury Crashes at Roundabouts – Final Report
- Volume V – Evaluation of Geometric Parameters that Affect Truck Maneuvering and Stability – Final Report
- Volume VI – Investigation of Crosswalk Design and Driver Behaviors – Final Report
- Volume VII – Human Factor Assessment of Traffic Control Device Effectiveness – Final Report
- Temporary Traffic Control for Building & Maintaining Single & Multilane Roundabouts
- Roundabout Practices (NCHRP Synthesis 488)
- Estimating the Life–Cycle Cost of Intersection Designs (NCHRP Web–Only Document 220)
- Crossing Solutions at Roundabouts and Channelized Turn Lanes for Pedestrians with Vision Disabilities – A Guidebook (NCHRP Report 834)
- Evaluating the Performance of Corridors with Roundabouts (NCHRP Report 772)
- A Study of the Traffic Safety at Roundabouts in Minnesota
- Evaluation of Safety and Mobility of Two–Lane Roundabouts
- Strategies for Effective Roundabout Approach Speed Reduction
- Accommodating Oversize/Overweight (OSOW) Vehicles at Roundabouts
Connections to Other Transportation Safety Topics
- Roundabouts can be designed to safely accommodate both pedestrians and bicycles
- Roundabouts are an effective speed management strategy
- Roundabouts can be part of an effective corridor access management plan
- Roundabouts work as great intersection designs for road diet projects
- Pavement friction plays an important role in road safety performance, including at intersections
- The Manual on Uniform Traffic Control Devices for Streets and Highways provides the national standards for all traffic control devices, including pavement markings, signs, and traffic signals
Last updated: Friday, December 1, 2023