Przepustowość wlotów nadrzędnych w modelach wykorzystujących automaty komórkowe
Journal Title: Autobusy. Technika, Eksploatacja, Systemy Transportowe - Year 2017, Vol 208, Issue 6
Abstract
This paper shows a method of calculation of capacity of the priority entries in a cellular automata model. The method of calculating the capacity and lost time for some types of priority intersections was shown in Generalna Dyrekcja Dróg Krajowych i Autostrad instruction. However, this instruction should not be used for some cases, especially those including phenomenon that cause blocking the traffic stream on intersection exits. This instruction also should not be used in case of changing load too. Usage of a cellular automata for modeling of traffic for this kind of intersections was proposed. Basic Nagel-Schreckenberg model was extended by inter alia traffic rules on the priority intersections, possibility of using heavy vehicles and procedures of keeping safe distance between vehicles. Possibility of using objects which block the stream of vehicles, such as pedestrian crossings, was included. The method of calculating capacities for priority entries was proposed and examined. Simplified model of small, one-lane, four-entry priority intersection was prepared and tested. A multiple simulations were conducted. Similarities and differences between the results from two calculating methods: obligatory instruction and the model of priority intersection using a cellular automata were shown and analyzed. Such model was consistent with obligatory method of calculation, especially for small and medium loads. For large loads, the capacities from cellular automata model were smaller then calculated with obligatory method. After the validation of the model, its elements will be used to build models of any kind of priority intersections, even untypical. It will be possible to simulate situations not taken into account in obligatory method of the priority intersections calculations.
Authors and Affiliations
Mariusz Smoczyński
Keywords
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