An Agent-Oriented Software Platform for Urban Traffic Networks Modelling, Analysis and Control
Telematic Applications, Volume # | Part#
Caramihai, Simona Iuliana; Dumitrache, Ioan; Voinescu, Monica
Digital Object Identifier (DOI)
One of the most acute problem of large urban agglomerations is the efficace management of their traffic infrastructure. Due to the socio-economical dynamics, it is a fact that the number of cars is increasing at a far more important rate than the infrastructure, resulting, especially at peak-hours, in traffic congestions that affect the quality of life, in terms of stress, noise, safety and pollution. These problems can be solved, at a certain level, by pollitical measures and public education, but they also need a technical approach related to the adaptation of urban traffic functioning at real context. More speciffically, traffic congestion can and should be avoided, in certain circumstances, by adaptating the duration of traffic lights to the car flow, this being an approach that necessitates the lowest investments in infrastructure modifications. Higher investments and different approaches can be justified when the problem became insolvable by traffic light control. The paper presents a software platform that was conceived for supporting the traffic light control approach for avoiding traffic congestions. The structure and functioning of the platform is related to the agent-oriented modelling approach for the traffic infrastructure, that will be described in section I. The agent-oriented approach is justified both by the difficulty of globally modelling a traffic network, with high dynamics and large-scale, complex structure and by the necessity to offer to the platform users a flexible, open-system environment for building their own process to analize. Basically, an agent is managing a crossroad, thus including information on its physical structure (number of input/ output car flows, structure of light cycles), links with adjacent agents (capacity of input roads) and functioning context (car-flows, actual durations for traffic light cycles etc.). The formal modelling approach is a hybrid one, taking into account both the continuous approximation of the car flow and the discrete structure of traffic lights cycle.
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