ABSTRACT
The popularity of roundabout application around the world is evident. Due to the inexperience of construction companies and the lack of proper national guidelines, distinctiveness in design is noticeable. In some intersections this led to reduction of Traffic (operational) Efficiency (TE). The purpose of this paper is to analyze: 1) the current state of roundabouts in Croatia; (2) known approaches to using geometry elements of roundabouts to predict TE; (3) overview and comparison of selected design guidelines; and (4) to present and comment the latest Croatian Roundabout Design Guidelines on State Roads 2014 and show examples of good practice. Research results will serve to disseminate the knowledge for proper application and implementation of national roundabouts in order to compare it with international design practice and standards.
