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Road congestion has troubled hundreds of thousands of drivers for a long time. In recent years, an application named dynamic routing, in which vehicles reroute themselves around congested areas with road information received, is proposed to deal with traffic jam. Due to lack of trust for traffic information data in vehicular ad hoc networks (VANETs), malicious vehicles can easily disseminate false...
Road congestion has troubled hundreds of thousands of drivers for a long time. In recent years, an application named dynamic routing, in which vehicles reroute themselves around congested areas with road information received, is proposed to deal with traffic jam. Due to lack of trust for road information in vehicular ad hoc networks (VANETs), malicious vehicles can easily disseminate false road information...
One of the key functions related to traffic optimization and control in Insigma is computing routes for emergency services. In Poland, due to its special status, a privileged car behaves in a substantially different way than a plain car. As a result, "privileged" routes should also considerably differ. In the paper, we propose a solution that combines road data and a behavior model, able...
In this paper, we apply VANET capabilities to develop a new adaptive traffic light control algorithm that takes into consideration in real time traffic density and vehicle relative position to the intersection. Our preliminary results show a substantial improvement of traffic throughput and average waiting time in comparison with fixed optimal cycle's time and with existing adaptive solutions.
For smart traffic scenarios, communication between traffic participants is of high importance. Classical approaches (e.g. for information about congestions) employ a server-based architecture, which raises scalability and privacy concerns. In this paper, we propose OverDrive, a decentralized overlay-based geocast service that is applicable in smart traffic scenarios and not prone to the shortcomings...
The availability of route network data is one of the key elements of evacuation route modeling for solving capacity-constrained routing problem; the data must include real-time updates, and routing must be in real-time. We consider the problem of constructing transport network data used for finding routes and schedules for evacuation from urban buildings and out of a predetermined neighborhood. The...
In this paper we present a new dynamic nature inspired algorithm for the enhancement of routing in problematic parts of the road network affected by traffic jams, accidents and so on. The algorithm is intended to improve the quality of navigation in the critical sections of road network or in its parts affected by accidents. By the Ant Colony Algorithm we search for new up-to-date information characterizing...
In this paper, we study the vehicle-to-vehicle communication and destination discovery problems that are often seen in VANET. Then we present a novel routing protocol called COoperative Destination discovery Scheme with ADaptive routing (CODS-AD). CODS-AD not only enables vehicles to cooperatively assist source node to discover the position of destination node, doing so without the support of location...
We present FastTrans - a parallel, distributed-memory simulator for transportation networks that uses a queue-based event-driven approach to traffic microsimulation. Queue-based simulation models have been shown to be significantly faster than cellular-automata type approaches, sacrificing spatial granularity for speed, while preserving link and intersection dynamics with high fidelity. Significant...
This paper proposes and discusses the modification and extension of the present radio frequency identification (RFID) system using it for vehicular communication system to route post-accident warning messages up to an effective NLOS distance in a cooperative manner. In a vehicular communication system, routing of warning messages in a co-operative manner increases vehicle safety and reduces mass crash,...
Based on traffic data acquisition by the vehicles themselves, road traffic self-organization has been studied for several years. Geolocation equipment is now available at an affordable cost. With the IEEE-802.11p standard, wireless inter-vehicle communication is of age. This explains current interest for this subject, the practical applications being immediate.
We consider the problem of data dissemination in vehicular networks. Our main goal is to compare the application-level performance of fully distributed and centralized data dissemination approaches in the context of traffic advisory systems. Vehicular networks are emerging as a new distributed system environment with myriad promising applications. Wirelessly-connected, GPS-equipped vehicles can be...
Recently, much research work has paid attention to delay tolerant networks (DTNs), which are networks with a frequent occurrences of network partitioning. Since the successful establishment of an end-to-end path between source and destination nodes is not guaranteed in these networks, routing is a challenging issue. In typical routing protocols for DTNs such as epidemic routing, they depend on data...
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