Review article

Analysis of capacity of roundabouts in the city of Zagreb according to HCM C–2006 and Ning Wu Methods

Nikola Šubić ; Hrvatska osiguravajuća kuća d.d., Ivana Lucića 2a, 10000 Zagreb, Croatia
Ivan Legac ; University of Zagreb, Faculty of Transport and Traffic Sciences, Department of Railway Transport and Traffic, Vukelićeva 4, Zagreb, Croatia
Hrvoje Pilko orcid.org/0000-0002-2255-3509 ; University of Zagreb, Faculty of Transport and Traffic Sciences, Department of Railway Transport and Traffic, Vukelićeva 4, Zagreb, Croatia

Abstract

There are various methods in the world for the calculation of the roundabout capacities. Some methods are very specific and implemented in different countries for different types of roundabouts. The paper presents two advanced scientific methods for the calculation of roundabout capacity – method HCM C-2006 and the method according to Ning Wu. Using the methods and according to the actual field measurements of traffic flows and driving conditions, the intersection capacity and the indicators of effectiveness (congestion level, delay control and vehicle queuing length) were analyzed. The analysis included fifteen roundabouts that are located in urban and suburban areas of the City of Zagreb. Results should also serve as basis for further systematic research of methodology for calculating the capacity of roundabouts in Croatia but also for possible selection of specific foreign method with calibration of certain coefficients according to local conditions of traffic flows.

Keywords

capacity; capacity calculation methods; delay control; roundabout; vehicle queuing length

Hrčak ID:

83930

URI

https://hrcak.srce.hr/83930

Publication date:

29.6.2012.

Article data in other languages: croatian

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