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In view of the current widely used city intersection signal control system, oriented by the concept of automatic sensor signal control, this paper tries to use a computer's procedural method, with the input of initial conditions, after automatic calculation, a result which will make the vehicles go through the intersection causing the shortest signal control delay time totally will be generated automatically,...
Firstly the necessity of the design of signal coordination control system in urban main roads is presented , and the design thinking and process of the signal coordination control system is given, then according to the design thinking and process create a model of signal coordination control system in urban main road., and Qingyang Road of LAN Zhou City is taken for example, based on the survey data...
Traffic signal is a measure of traffic command, which distributes right of way to the traffic flow in time domain. Through comparative study between RBF network and BP network, this paper has selected RBF network to control the traffic single. Green Light Interval is decided by the measurement parameters of detector in the actuated signal control. In the usually, the time phase number of the system...
Traffic congestion has become a major problem in today's society. It may cause a great waste of material and human casualties. We think the fixed-time-state traffic light control scheme is one important reason. An intelligent traffic light control scheme is necessary in order to give a solution to this problem. The paper proposes a model to describe a road cross. In terms of dynamic and real-time...
This paper presents a new intelligent control strategy to solve the coordination control problem of urban arterial traffic. The whole control structure includes two layers - the coordination layer and the control layer. Public cycle time, splits, inbound offset and outbound offset are calculated in the coordination layer. Public cycle time is adjusted by fuzzy rules according to the traffic flow saturation...
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...
A well-operating urban public transportation system has a wide range of requirements in many aspects such as route design, station density, scheduling management, demands analysis, service level, and so on. In order to analyze and research such complex system, a method is to use a computer simulation which simulates the behavior of individuals in complex systems, so that a group of such individuals...
Responding to the Green Transportation requirement for urbanization nowadays, a new set of 3E criteria, which takes into account efficiency, economy and environment effects, to evaluate intersections operational traffic status is proposed first in this paper. Then, we establish an AHP-based evaluation architecture for intersections with multi-level and multi-objective functions, on the basis of the...
The design is automatic tracing intelligent vehicle control system. In the design, simplifies external locus analysis of the kinetic model as a built-in model, In order to ensure the model perturbation or random interference when uncertainty functions to maintain its satisfactory quality, shorten the control response time of intelligent vehicle through the nonlinear controller by regulation of steering...
Urban traffic congestions lead to a great deal of time consumption and exhaust emissions. So alleviating congested situation will have a good impact on both economy and environment. The signal control at isolated intersections is an effective and most important way to reduce the traffic jams and collisions. A lot of control theories including traditional mathematical ways and modern intelligent ways...
According to loop characteristic of partially urban road network, urban loop-road traffic coordination control system based on the spit-layer parallel cusp catastrophe particle swarm optimization algorithm is proposed. In the system, the area control system is replaced by the loop-road line control system, and the control sub-area is closed loop-road in road network, a three-layer stepped distributed...
A critical issue encountered in implementing a bus signal priority system is to ensure a trade-off between the delay of a bus and the surrounding traffic. Traditional BSP methods treat buses uniformly so that an empty bus may have the same priority to the full loaded bus, and lead to an excessive delay for private traffic. However, with RFID technique, a control model can realize delicate control...
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...
In this paper, an RFID signal capturing and controlling system for BRT (Bus Rapid Transit) priority is proposed. Setting an active RFID tag on the BRT vehicle and setting an RFID reader close the road intersections, the reader identify the coming BRT vehicle quickly and exactly, the system perform the BRT signal priority process and control the signal lamp phase by comparing the BRT schedule. We analyse...
The present technologies provide only assistance in a car for controlling the relative speed and distance between two vehicles in the same lane and permit to drive at a constant given speed in a Highway free of traffic and to maintain a constant distance with the vehicle ahead but not collision avoidance But the proposed system provides enhancements in the present adaptive cruise control system, which...
This article paid more attention to the confliction of the flowing in and out for the circle, and put forward new methods to control vehicles flow by setting temporary parking area (abbreviated as TPA) in the circle and setting traffic lights. The multiple goal function emphasizes the principle that the number of the waiting vehicles is the least and while the efficiency of the vehicles out of the...
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...
Transit signal priority (TSP) is a direct way to improve public transit service level and attract residents to trip. This paper proposes a novel signal control logic for TSP and attempts to improve the transit performance, minimize impaction of the other traffic mode by real time adjust the control parameters of transit departure ratio and vehicle delay ratio based on transit service schedules.
Traffic signal control is an effective way to regulate traffic flow to avoid conflict and reduce congestion. The ACO (Ant Colony Optimization) algorithm is an optimization technique based on swarm intelligence. This research investigates the application of ACO to traffic signal control problem. The decentralized, collective, stochastic, and self-organization properties of this algorithm fit well with...
Road traffic statistics have shown that multi-event crashes typically result in a higher death toll than single-event crashes. One type of those multi-event crashes could be a crash where the initial harmful event leads to a loss of directional control of the vehicle. In this work, we study countermeasures during such crashes, namely, vehicle stabilization in response to exogenous impulsive disturbances...
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