Evaluating the Performance of Corridors with Roundabouts

Title: Evaluating the Performance of Corridors with Roundabouts
Author: Rodegerdts, Lee A
Publication Date: 2014
Dewey Decimal Number: 388.411
Call Record: DIGITAL      388.411  Rodegerdts  2014


Evaluating the Performance of Corridors with Roundabouts

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Record Type:



Transportation Research Board Business Office

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Washington, DC 20001 United States
Order URL: http://www.trb.org/Main/Blurbs/171016.aspx

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Order URL: http://worldcat.org/isbn/9780309284141


Roundabouts are increasingly recognized as an intersection control strategy that can fulfill multiple performance goals related to traffic operation and safety, as well as meet societal goals related to sustainability, livability, complete streets, context sensitive design, economic development, and others. Some transportation agencies have recently constructed or approved the use of a series of roundabouts on an arterial rather than the traditional solution of coordinated signalized intersections. While there are anecdotal reports suggesting that functionally interdependent roundabouts on a corridor are successful in meeting performance goals, little research has been conducted to determine objectively the efficacy of this alternative as compared to signalized intersections. This report provides performance measurement and evaluation methods, including a predictive model for travel speed and an overarching comparison framework, for comparing the performance of a corridor with a functionally interdependent series of roundabouts to a corridor with signalized intersections in order to arrive at a design solution. For the purposes of this research, a “series of roundabouts” is defined as at least three roundabouts that function interdependently on an arterial. These evaluation methods will be of use to traffic engineers and transportation planners.

Report/Paper Numbers:

Project 03-100




Rodegerdts, Lee A
Jenior, Pete M
Bugg, Zachary H
Ray, Brian L
Schroeder, Bastian J
Brewer, Marcus A



Publication Date:



NCHRP Report

Issue Number: 772
Publisher: Transportation Research Board
ISSN: 0077-5614



Media Type:



Appendices; Figures; References; Tables

Subject Areas:

Design; Highways; Operations and Traffic Management; I20: Design and Planning of Transport Infrastructure; I73: Traffic Control