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Updating the capacity model of roundabouts
 Patočka, Miroslav ; Bačová, Katarina (referee) ; Kumpošt, Petr (referee) ; Radimský, Michal (advisor)
The doctoral thesis deals with a new approach to the characteristics of traffic flows at roundabouts in relation to the capacity estimation. The currently used methodology, which was introduced in 1973 by Werner Siegloch, is based on imprecise assumptions and simplifications, which may ultimately distort the results of capacity assessments carried out according to the existing valid national regulation. This thesis uses not only an innovative procedure for obtaining empirical data by image analysis using so-called computer vision, but above all, the process of gap-acceptance of main-stream time clearances by minor stream vehicles is solved as a stochastic phenomenon. This approach aims to replace the deterministic values of the critical gap and follow-up headway with an appropriate probability density function that will meet empirical data in the best way.
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