New Generation Roundabout Application A Study Case: Karabuk 100.Year Roundabout

Abstract

Roundabouts are common areas formed by the intersection, merging and separation of two or mor e roads and are one of the most important road parts that constitute various risks in terms of road safety. There are various standard intersection applications in the world and our country. Only capacity analyzes are not enough to determine intersection type. Factors such as traffic safety, land topography, cost, development plans, expropriation, local demands, history, cultural and touristic characteristics of the area, and the requirements of the public authorities are also necessary factors to be assessed. However, traffic problems at intersections, which are designed in a standard way without considering the above-mentioned factors affecting intersection design, require different solutions especially in these parts of highway. In this study, existing problems were identified on the basis of traffic counts and field observations on a sample roundabout in Karabük Province, 100.year neighborhood, at the intersection of 1002 Street and 1003 street. A new intelligent roundabout design was applied and the applicability of the new intersection model in addition to capacity and safety has been demonstrated and optimized using Ptv-Vissim and Autoturn software’s. The revealing results are; it is necessary to design the intersections considering the specific parameters of each intersection instead of standardization and it is necessary to adopt new approaches (intelligent crossroads etc.) in intersection design.