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ANALYSIS OF THE EFFECTIVENESS OF THE IMPLEMENTED DESIGN ARRANGEMENTS ON THE VEHICLE OPERATING SPEEDS IN THE TEMPO-30 ZONE

A. Sołowczuk

Abstract

Traffic calming measures are implemented increasingly frequently to improve safety of traffic in urban areas. Speed is one of the parameters having a bearing on the safety of traffic and, as such, it is important to assess the effect of the design measures on the operating speeds of vehicles. This paper investigates the efficiency of traffic safety measures implemented in city centre areas. The research site was a street where alterations of vehicular and pedestrian traffic management and parking arrangements had been implemented in a recently completed project. The street starts and ends with traffic light controlled junctions and there is one simple junction half way in between. With this layout it was possible to section off two test sections. On both sections vehicle speed surveys were conducted over one-hour time spans. Both average and 85th percentile speeds were estimated on either section. The surveys were carried out on a dry day under dry pavement surface conditions. The speed data from the surveys were subjected to a statistical analysis. The statistical inference part of the research included independence and median tests and significance and goodness-of-fit tests were also carried out. The results of the statistical analysis demonstrate a significant impact of the implemented street design on the speed of vehicles. The final conclusions state that on the analysed street section the implemented traffic management arrangements have resulted in a significant reduction of vehicle speeds. A considerable slowing of vehicle speeds following the completion of the street upgrading project was also confirmed.

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DOI resolver: doi.org/10.5593/sgem2019/6.2/s27.045

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