Turbo – Roundabouts and their Basic Evaluation at Realized Constructions in Czech Republic

The article deals with an operation issues and traffic evaluation at selected turbo-roundabouts realized in Czech Republic. Also describes redevelopment possibility of existing roundabouts with classic layout to the roundabouts with spiral arrangement of the traffic lanes on the circulatory roadway. Described are advantages and disadvantages of the spiral arrangement in compare with normal roundabouts. The article evaluates Czech methodology of turbo - roundabout design, which was published in 2015 and compares its findings with foreign methodologies, especially Dutch and Slovakian standards. Presented are basic divisions of turbo - roundabouts and how the single types of layout are different from the point of view of number of traffic lanes and estimated capacity. There is shown the list of realized turbo - roundabouts on which is made a comparison of identity of the selected parameters of geometric elements defined in the Czech methodology with the foreign standards. Evaluation criteria of realized constructions are basic design elements of turbo-roundabouts, traffic lane (roadway) width and layout and design arrangement with aiming on problematic design features. The article also briefly deals with the evaluation of effectiveness from the point of view of capacity and traffic accidents, when are compared traffic accidents data at selected locations in Czech Republic where redevelopment of conventional types of intersections to turbo-roundabouts were made.


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  • Accession Number: 01639715
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Jun 28 2017 2:40PM