Natężenie nasycenia relacji dla skrzyżowań z sygnalizacją świetlną modelowanych z wykorzystaniem automatów komórkowych
Journal Title: Autobusy. Technika, Eksploatacja, Systemy Transportowe - Year 2017, Vol 208, Issue 6
Abstract
This paper shows a method of calculation of the saturation flows for vehicle streams in the signalised intersection in a cellular automata model. The method of calculating capacity and lost time for some types of signalised 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. Usage of a cellular automata for modelling the traffic for signalized intersections was proposed. Basic Nagel-Schreckenberg model was extended by inter alia traffic rules on the signalised intersections, possibility of using heavy vehicles and procedures of keeping safe distance between vehicles. Possibility of decreasing of vehicle speed, making it possible to simulate the real conditions of traffic, was included. The method of calculating saturation flow for vehicle streams was proposed and examined. Simplified model of small, one-lane, four-entry signalised intersection was prepared and tested. A number of simulations were made. Similarities and differences between the results from two calculating methods: obligatory instruction and the model of signalised intersection using a cellular automata were shown and analysed. Possibility of receiving any values of saturation flow for vehicle streams in proposed model was shown and analysed. After the validation of the model, its elements will be used to build models of any kind of signalised intersections, even untypical. It will be possible to simulate situations not taken into account in obligatory method of the signalised intersections calculations.
Authors and Affiliations
Mariusz Smoczyński
Keywords
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