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Roundabout Books and Guidelines


Roundabouts an Informational Guide - Second Edition  TRB’s National Cooperative Highway Research Program (NCHRP) Report 672: Roundabouts: An Informational Guide – Second Edition explores the planning, design, construction, maintenance, and operation of roundabouts. The report also addresses issues that may be useful in helping to explain the trade-offs associated with roundabouts.

This report updates the U.S. Federal Highway Administration’s Roundabouts: An Informational Guide, based on experience gained in the United States since that guide was published in 2000.

Roundabout Guidelines  Washington State DOT

Roundabout Information  Nevada State DOT

Roundabout Guidelines Created by Bill Baranowski for Tooele County in 2000.
Tooele County, Utah.

Roundabouts at Maryland State SHA
They have around 40 roundabouts on the state highway system.

Wisconsin State DOT Roundabout Guidelines.

Arizona DOT Roundabouts
Arizona DOT

The New York State (NYSDOT) Roundabout Guidelines
Describes roundabout guildlines published by the Department of Transportation for designing roundabouts in New York. DOT requires design and analysis using Synchro, VISSIM or RODEL software.

NE Roundabouts Training Slides
Slide show for designing roundabouts.

The Florida Roundabout Guide
Briefly describes a guide published by the Florida Department of Transportation for designing roundabouts in Florida. Slide show.

Kansas Roundabout Design Guide and Video

KSU Traffic Discussion Forum

New South Wales Updated Roundabout Road Rules
New roundabout driving rules introduced in December 1999 by New South Wales RTA in the Sydney, Australia area. Gives a detailed explanation of how to indicate (signal) when entering and exiting a roundabout. Includes a PDF file of their rules brochure. The rules are generally followed as I found on a visit in March 2000.(Bill Baranowski)

Richfield, MN Roundabout Projects
Check out the countdown timer and the FAQ.

MTJ Engineering
Wisconsin Based Roundabout Designer.

Magic Roundabout:
Describes How Swindons Magic Roundabout came to be, mini-roundabouts.

Describes a guide to designing mini-roundabouts.

Transportation Research Board Bookstore
Search on "roundabouts" to purchase Modern Roundabout Practice in the United States, NCHRP 264, a Transportation Research Board report on modern roundabout applications in the United States.

The Design of Roundabouts by Mike Brown
Mike's book is available from Her Majesty's Stationery Office for 40 pounds. You can access the book through their virtual bookstore. Complete a search in their virtual bookstore for "The Design of Roundabouts" to find the book.

Oregon Guide-PDF File

CALTRANS Roundabout Guidelines
California state guidelines.

Utah DOT Roundabout Guidelines
The Park City Intermodal roundabout located on SR-224 in Park City and the Bloomington Interchange roundabouts on Interstate 15 in St. George City were approved by UDOT. The state limits roundabouts to 2 circulatory lanes. A roundabout shall be justified based on the following - A capacity analysis shall be conducted to determine the Level of Service (LOS) (delay) for a roundabout compared to a traffic signal or other control devices. The analysis shall be performed using Rodel. The analysis shall compare the LOS based on the delay encountered.

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