Efterpi Damaskou, Fotini Kehagia



Quality of Service (QOS) of Urban Roundabouts: A Literature Review



Nowadays roundabouts have been a widespread design solution, in urban and rural areas, mainly due to their efficient traffic control and their safety performance. They provide several advantages in comparison to signalized and stop-controlled intersections. While there is generally acceptance by researchers that roundabouts create operational and safety benefits, their acceptance by the general public is not at the same level, as past research has demonstrated strong public sentiment against roundabouts. The Highway Capacity Manual (HCM2010), describes specific techniques to evaluate the traffic handling ability of a transportation facility of roundabouts through measuring the Level of Service (LOS). It also introduces the concept of Quality of Service (QOS) to assess the perceived performance of the transportation facility from the viewpoint of drivers and travelers. It has been assumed that both LOS and QOS are interacting equally to roadway operating agencies, transportation engineers, and other decision makers. The paper presents basic characteristics of a modern roundabouts. The clarification of the definitions of QOS and LOS of roundabouts is also presented and a review on the recent published research related to LOS and QOS of urban roundabouts is being carried out. Through this review, the authors intend to identify the factors affecting the two indexes. Moreover, in this paper a number of surveys through questionnaires about public opinion on roundabouts is reviewed and their results of "before and after" analysis are presented


Roundabouts, Level of Service, Quality of Service, Capacity, User perception, Public opinion


[1] National Research Council. Transportation Research, Board. (2010). HCM 2010: highway capacity manual. Washington, D.C.: Transportation Research Board.

[2] Flannery A. and Datta T., "Operational Performance Measures of American Roundabouts," Transportation Research Board: Journal of the Transportation Research Board, vol. 1572, pp. 68 75, 1997.

[3] Shrestha S. K., "Benefits of Urban Roundabouts in the State of Maryland," Compendium: Papers on Advanced Surface Transportation Systems, Vols. SWUTC/02/476700-00003-4, 2002.

[4] "Roundabout Design Standards: A Section of the Traffic Engineering Policy & Design Standards," City of Colorado Springs, Colorado Springs, CO, USA, 2005.

[5] Federal Highway Administration, "Roundabouts: Technical Summary," FHWA - SA. 10-006, Washington, D.C., USA, 2010.

[6] http://www.shakopeemn.gov/living-here/my street/current-projects/mini-roundabout

[7} ttps://modernroads.net/blog/roundabouts/

[8] https://www.castanet.net/news/Behind-theWheel/195322/Lost-in-a-roundabout

[9] Kittelson & Associates Inc., Roundabouts: An Information Guide. 2000. p. 284.

[10] W. Hu, A. T. McCartt, J. S. Jermakian and S. Mandavilli, "Public Opinion, Traffic Performance, the Environment, and Safety after Construction of Double-Lane Roundabouts," Transportation Research Record: Journal of the Transportation Research Board, vol. 2402, pp. 47-55, 2014.

[11] M. H. Martens and M. R. J. Fox, "Do Familiarity and Expectations Change Perception? Drivers' Glances and Response to Changes," Transportation Research Part F, vol. 10, pp. 476-492, 2007.

[12] P. Garder, "Little Falls, Gorham: Reconstruction to a Modern Roundabout," Transportation Research Record: Journal of the Transportation Research Board, vol. 1658, pp. 17-24, 1999.

[13] Wayne State University Transportation Research Group, "Improving Driver's Ability to Safely and Effectively Use Roundabouts: Educating the Public to Negotiate Roundabouts," Michigan Department of Transportation, Lansing, MI, USA, 2011.

[14] R. A. Retting, G. Luttrell and E. R. Russell, "Public Opinion and Traffic Flow Impacts of Newly Installed Modern Roundabouts in the United States," ITE Journal, vol. 72, no. 9, pp. 30-32, 37, 2002.

[15] L. Rodegerdts, "NCHRP 3-65: Applying Roundabouts in the United States," Committee on Highway Capacity and Quality of Service, Washinton, D. C., USA, 2004.

[16] Søren Underlien Jensen, " Safe roundabouts for cyclists"Accident Analysis & Prevention, Vol. 105, Aug 2017

[17] Retting, R. A., G. Luttrell, and E. Russell. Public Opinion and Traffic Flow Impacts of Newly Installed Modern Roundabouts in the United States. ITE Journal, Vol. 72, No. 9, 2002, pp. 30-37

[18] Retting, R. A., S. Mandavilli, E. R. Russell, and A. T. McCartt. Roundabouts, Traffic Flow and Public Opinion—Evidence from the U. S. Traffic Engineering and Control, Vol. 47, No. 7, 2006, pp. 268-272. [19] Redington,T. Montpelier's Modern Roundabout at Keck Circle, Neighborhood Opinion Survey. Vermont Agency of Transportation, Montpelier, 1997.

[20] Retting, R. A., A. T. McCartt, and S. Y. Kyrychenko. Long-Term Trends in Public Opinion Following Construction of Roundabouts. In Transportation Research Record: Journal of the Transportation Research Board, No. 2019, Transportation Research Board of the National Academies, Washington, D. C., 2007, pp. 219-224

[21] Dissanayake, S., and L. Perera. Highway Safety Issues of Older Drivers in Kansas. Report No. K-TRAN: KSU-07-3. Kansas Department of Transportation, 2009.

[22] Hydén, C., Várhelyi, A., 2000. The effects on safety, time consumption and environment of large scale use of roundabouts in an urban area: a case study. Accident Analysis and Prevention 32, 11–23

[23] Flannery A, Rouphail N, Reinke D (2008) Analysis and Modeling of Automobile Users’ Perceptions of Quality of Service on Urban Streets. Journal of the Transportation Research Board2071:26-34. doi:10.3141/2071- 04

[24] Quality/Level of Service Handbook, Florida Department of Transportation, Tallahassee, 2002

[25] Lord, D, vanSchalkwyk, I, Chrysler, S and Stap lin, "L. A Strategy to Reduce Older Driver Injuries at Intersections Using More Accommodating Roundabout Design Practices". Accident Analysis and Prevention, Volume 39, Issue 3, May 2007, Pages 427-432, 2007

[26] Jørgensen, E., and N. O. Jørgensen. Trafiksikkerhed i rundkørsler i Danmark. Rapport 235 2002. København, Vejdirektoratet, 2002.

[27] Van der Bijl, B., Vreeswijk, J., Bie, J., & van Berkum, E. (2011, October). Car drivers' perception and acceptance of waiting time at signalized intersections. Intelligent Transportation Systems (ITSC), 2011 14th International IEEE Conference on (pp. 451- 456). IEEE.

[28] Pecheux, K.K., M.T. Pietrucha, and P.P. Jovanis. (2000). User Perception of Level of Service at Signalized Intersections, In Proceedings, 79th Annual Meeting of the Transportation Research Board, Washington, D.C

[29] May, A. D. Performance Measures and Levels of Service in the Year 2000 Highway Capacity Manual. Final Report, NCHRP Project 3-55(4). TRB, National Research Council, Washington, D.C., Oct. 31, 1997

[30] Fred Hall, Sarah Wakefield, Ahmed Al-Kaisy, (2001)"Freeway Quality of Service: What Really Matters to Drivers and Passengers?" Transportation Research Record: Journal of the Transportation Research Board . Volume 1776.

[31] Ibrahim Hashim Khliefat, May 2014." Analysis and modeling of drivers perception of quality of service on urban roundabouts". Phd. thesis in civil engineering /transportation (The University Of Ak

Cite this paper

Efterpi Damaskou, Fotini Kehagia. (2017) Quality of Service (QOS) of Urban Roundabouts: A Literature Review. International Journal of Transportation Systems, 2, 37-45


Copyright © 2017 Author(s) retain the copyright of this article.
This article is published under the terms of the Creative Commons Attribution License 4.0