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1.
Premature seizure of traffic flow due to the introduction of evolutionary games
Matjaž Perc, 2007, izvirni znanstveni članek

Opis: We study the impact of evolutionary games on the flow of traffic. Since traffic participants do not always conform to the imposed rules, the introduction of games, i.e. set of strategies defining the behavioural pattern of agents on the road, appears justified. With this motivation, and the fact that individuals can change their strategy in the course of time, the evolutionary prisoner's dilemma game is introduced between neighbouring agents, enabling them to choose between cooperation and defection. Mutual cooperation enables forwarding to both agents for one step, while the defector is able to advance two steps when facing a cooperator, whereby the latter is forced to go one step backwards. Two defectors end up in a halt until the next iteration. Irrespective of their strategy, however, agents can move only if the road ahead is free. Jumps are never allowed. We show that this simple and plausible supplementation of the discrete cellular automaton Biham-Middleton-Levine (BML) model induces a traffic flow seizure by a substantially lower initial density of cars as in the absence of evolutionary games. The phenomenon is explained by studying the one-dimensional variant of the BML model with different advancement steps on the circular ring. In view of the proposed explanation, findings are generalized also to other types of games, such is the snowdrift game, and some statistical properties of gridlock formation in the presence of evolutionary rules are outlined. Our findings suggest that 'bending the law' results in a premature occurrence of traffic jams and thus unnecessarily burdens the transportation system.
Ključne besede: dynamic systems, traffic flow, theory of games, evolutionary rules, flow simulations, prisoner's dilemma
Objavljeno v DKUM: 03.07.2017; Ogledov: 569; Prenosov: 341
.pdf Celotno besedilo (1,17 MB)
Gradivo ima več datotek! Več...

2.
Roundabout arm capacity determined by microsimulation and discrete functions technique
Tomaž Tollazzi, Matjaž Šraml, Tone Lerher, 2008, izvirni znanstveni članek

Opis: The paper demonstrates the influence of the multi-channel pedestrian flow on the actual capacity of a one-lane roundabout, using micro-simulation and discrete functions. The proposed model is based on the theory of the expected time gap between the units of pedestrian traffic flow, which have the priority when crossing the arm of the roundabout. The proposed model represents an upgrade of the previous research in the field of modelling traffic flows in the one-lane roundabout.Apart from the multi-channel pedestrian flow the disturbances caused by the circular traffic flow of motorised vehicles at the roundabout are also considered. In this way the model can better illustrate the real conditions in traffic. A simulation analysis has been performed on the roundabout arm at Koroška Street in Maribor. The results of the analysis have indicated a relatively high reserve of the actual throughput capacity for the main motorized traffic flow in the analysed roundabout arm. The presented model represents a practicable and adaptable tool for planning the roundabout capacity in practice and for the sensitivity analysis of individual variables on the throughput capacity of the roundabout.
Ključne besede: roundabouts, traffic flow analysis, micro-simulation modelling, capacity analysis
Objavljeno v DKUM: 05.06.2017; Ogledov: 1010; Prenosov: 110
.pdf Celotno besedilo (4,50 MB)
Gradivo ima več datotek! Več...

3.
Modeling of city logistics
Sabrina Trafela, 2013, magistrsko delo

Opis: Master thesis has it's fundamentals in the use of theoretical methods for modeling purposes on the case study of city logistics and modeling of traffic flow and transportation problem on the city of Győr, Hungary. In practical part, we made a measurements of traffic flow on street sections in the city of Győr. With Android application, we gathered necessary data. We also prepared maps of the route sections of the city from various entry points to the final, destination point. Purpose of our thesis was finding the optimal solution for the delivery to the city centre with the use of strategic games. Final step was a preparation of mathematical model in Mathematica programming environment, which gave us results, but most important is the development of the model itself. Model is constructed in a way that can be use in various possible situations and on different city centres or case studies.
Ključne besede: city logistics, strategic games, Nash Equilibrium, modeling of traffic flow
Objavljeno v DKUM: 17.10.2013; Ogledov: 1521; Prenosov: 97
.pdf Celotno besedilo (5,15 MB)

4.
The use of micro-simulation in determining the capacity of a roundabout with a multi-channel pedestrian flow
Tomaž Tollazzi, Tone Lerher, Matjaž Šraml, 2008, izvirni znanstveni članek

Opis: The main purpose of this paper is to analyse the influence of the multi-channel pedestrian flow on the capacity of the one-lane roundabout, using discrete simulation methods. The proposed model is based on the theory of the expected time void between the units of pedestrian traffic flow, which have the priority when crossing the arm of the roundabout. The proposed model represents an upgrade of the previous research in the field of modelling traffic flows in the one-lane roundabout. While the previous model of the pedestrian crossing is handled as the single-channel system in which the pedestrians arrive randomly from one side of the pedestrian crossing only, the proposed model deals with the multi-channel system in which the pedestrians arrive randomly from both sides of the pedestrian crossing. In thi sway the mathematical model can better illustrate the real conditions. The previous model considers only the disturbances of entry traffic flow of motorised vehicles caused by the pedestrian flow crossing the roundabout arm. The proposed model considers the disturbances caused by the circular traffic flow of motorised vehicles as well. A simulation analysis has been conducted on the roundabout at Koroška Street in Maribor, in which the counting of the motorised traffic flow and the pedestrian flow has been performed in the morning peek hour. The results of the analysis have indicated a high reserve of the capacity for pedestrians who arrive from the left and right sides of the roundabout with regard to motorised vehicles in the analysed arm of the roundabout. The real reserve of the capacity would otherwise be smaller in case of enlargement of the motorised vehicle flow in the future. Nevertheless it would be high enough for an undisturbed traffic flow of motorised vehicles through the roundabout to be possible. The presented methodology represents a practicable and adaptable tool for planning the roundabout capacity in practice and for the sensitivity analysis of individual variables on the throughput capacity of the roundabout.
Ključne besede: roundabout, pedestrian flow, traffic flow modeling, simulation models
Objavljeno v DKUM: 31.05.2012; Ogledov: 1640; Prenosov: 45
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