PROPOSAL FOR A REVISED SLOVENIAN TECHNICAL SPECIFICATION FOR TRAFFIC CALMING AT UNSIGNALIZED AT-GRADE INTERSECTIONS

Unsignalized at-grade intersections represent an important part of the road network, where the large number of conflict points, diverse traffic manoeuvres, and inappropriate vehicle speeds frequently lead to traffic accidents. Effective planning of traffic calming devices and measures therefore plays a key role in improving the road safety of all road users. In Slovenia, the planning of traffic calming measures at unsignalized at-grade intersections is regulated by the technical specification TSC 02.203:2009, which, due to developments in traffic planning, the introduction of new measures, modern design approaches, and seventeen years since its publication, requires revision. The aim of this paper is to present a proposal for a revised Slovenian technical specification. A systematic review of national and international scientific literature, technical guidelines, standards, and examples of good practice was conducted. Based on this review, contemporary approaches, new measures, and improvements to existing solutions were identified, forming the basis for the proposed revised technical specification. The proposal includes new planning principles, enhancements to existing measures, and the introduction of new infrastructure solutions. The proposed revision provides a professional basis for more modern planning of traffic calming measures and contributes to improved road safety, better intersection visibility, and a higher-quality traffic environment.