The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
Road congestion is a complex, significant and continuing problem. This project is concerned with urban road systems and traffic light control. The objective is to create a novel traffic controller which uses available forward road capacity (AFRC) detection and locality awareness in conjunction with existing backpressure methods as a means to reduce the duration of congestion. The controller is an...
With the goal of accomplishing vehicular traffic simulations close to reality, modelling intersection control is a very important issue which affects the traffic flow and hence simulation results considerably. This paper presents an exhaustive intersection control applicable for continuous traffic simulators. Our work contains many types of road crossings and junctions occurring in real road networks,...
With our interest to reduce traffic congestion, simulations are necessary to investigate how to achieve this goal. Because of the difficulty of real-time experiments, traffic simulators are a good and widely used tool for analyzing specific situations of the traffic flow virtually. This paper introduces TraffSim, a new platform-independent framework, which is capable of simulating microscopic vehicular...
Along with the economic development, cities are increasingly congested in China. In order to eliminate peak-hour congestion, many cities establish priority lanes such as bus lanes and Olympic lanes. Although priority lanes could help Local Authorities gain its short-term management objectives, at the same time, it would greatly infringe on the legitimate rights of other vehicles and waste the scarce...
Based on the digital hormone model, this paper established a new distributed coordination control scheme for traffic signals, which adopts some hormonal information. The experiments with a traffic network of 8 junctions shows that this new control method is obviously superior to the timing control, sensing control and real-time control.
Recently, vehicular sensor networks (VSNs) have emerged as a new wireless sensor network paradigm that is envisioned to revolutionize driving experiences and traffic control systems. Many existing routing protocols for VSNs have good performance on data routing in a city environment. In this paper, we propose a traffic control aware routing for VSNs, which is called PUT. It considers two modules of...
This paper proposes a strategy of urban bimodal traffic regulation based on multi-agent modelization. The objective of this strategy is to work on the duration of the traffic lights to regulate traffic for transport modes that include private and public transport vehicles, principally the bus. The model respects the method of bus regulation with a route agent, who supervises all the vehicles on the...
As a basic attribute of road traffic flow, free-flow speed is an indispensable parameter in most of transport research and management tasks. Employing the traditional freeflow speed definition method, it is hard to obtain a steady result with the real-time traffic data from Intelligent Transportation System (ITS). Based on analysis of real-time traffic data in Shanghai urban expressway, a statistical...
An evolutionary Multi-Objective Algorithm (MOA) is used to investigate the trade-off between CO2 savings, distance and number of vehicles used in a typical vehicle routing problem with Time Windows (VRPTW). A problem set is derived containing three problems based on accurate geographical data which encapsulates the topology of streets as well as layouts and characteristics of junctions. This is combined...
Taking urban traffic trunk to control for the study, it points out a number of shortcomings of the present trunk control method and puts forward the method that for the urban routes traffic characteristics, in a certain period of time, the route cycle and the phase between each two intersections remains the same, while the split is real-time adjusted by certain intersection controller, web-based environment...
This paper looks into prospects of pre-timed arterial traffic control systems for cities with limited infrastructures. The methodologies for designing a pre-timed arterial traffic controller system were researched. A prototype designed and implemented in field programmable gate arrays (FPGA) is presented. Dar es Salaam Roads have been used to provide data for the design and implementation whereby...
This paper presents a fuzzy traffic controller for controlling a multilane-multiple traffic intersection in urban city environment. The developed controller applied to the model is based on the cooperation and distributed mechanisms with the neighbors' intersection. The phase sequence and phase length extension are used in decision making to provide efficient and more optimal traffic control. The...
Behavior of road vehicles is highly affected by the road situations. The control units of the vehicles should know as more as possible information on the road to carry out proper operations. But it is hard to get road information with traditional detection approaches. Positioning plus electronic map provides an access to get road information which is position dependent. Based on the original .shp...
The full capacity of roundabout is the maximum value of the sums of all entry flows. On the assumption that the traffic operation characteristics are remained unchanged which include critical gap, the minimum headway, the following headway and the turn-orientation proportion of each entry, the sum of all entry flows is the full capacity of roundabout when each entry flow is equal to the entry capacity...
We present in this paper the modeling of an elementary 2D-Traffic system, basing on Petri nets and minplus algebra. Our aim is to derive fundamental diagrams of 2D-traffic on a system of one circular road with one junction without turn, taking shape of the number eight (8). The fundamental diagram is the relation between the flow and the density of vehicles on a road. Two possibilities of managing...
This paper presents the key points of implementing a road monitoring and traffic control system which in traffic monitoring command system. Road monitoring and traffic control system can be divided into road traffic surveillance and traffic control sub-system. It can direct impact on the efficiency of traffic monitoring command system. The high cost-effective of the road monitoring and traffic control...
Congested traffic conditions are a daily nuisance of modern life. Reduction of these congestions will lead to a less stressful and healthier commute. Before mitigating solutions can be obtained, the problem needs to be understood and analyzed. Exact solutions based on probability theory and queuing systems are difficult to obtain for even moderately complex systems. Further for complex systems, insight...
In this paper rules adaptive control system based on genetic study classification algorithm is put forward in order to solve the traffic signal's separated, complex, non-linear features and prevent failure of the control rules in urban regional coordination traffic signal control system. In this study, we build the self-organization model by fluid dynamics, and get the control parameters and environment...
Traffic light system gives sign of direction and warning to road user to avoid road collision and to optimize the flow rate of vehicle in the junction. This paper presents design of a low cost performance traffic light system. This type of traffic light is suitable for town and small city where sophisticated traffic light system is too costly. A traffic light system nearby the university was chosen...
The OD matrix at a signalised junction estimated for traffic light cycle represents a crucial information for transportation systems. A new dynamic two-steps method is proposed to estimate such an OD matrix. First, a vehicle conservation law is build in a dynamical way for each traffic light cycle using fuzzy-timed high-level Petri nets (FTHN). It is represented by an under-determinate system of equations...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.