Existing inefficient traffic light control causes numerous problems, such as long delay and waste of energy. To improve efficiency, taking real-time traffic information as an input and dynamically adjusting the traffic light duration accordingly is a must. In terms of how to dynamically adjust traffic signals’ duration, existing works either split the traffic signal into equal duration or extra...

Title of dissertation: SIMULATION OPTIMIZATION OF TRAFFIC LIGHT SIGNAL TIMINGS VIA PERTURBATION ANALYSIS William Casey Howell, Doctor of Philosophy, 2006 Dissertation directed by: Professor Michael C. Fu Applied Mathematics and Scientific Computation Program We develop simulation optimization algorithms for determining the traffic light signal timings for an isolated intersection and a network ...

The traffic in urban areas is mainly regularized by traffic lights, which may contribute to the unnecessary long waiting times for vehicles if not efficiently configured. This inefficient configuration is unfortunately still the case in a lot of urban areas, where most of the traffic lights are based on a 'fixed cycle' protocol. To improve the traffic light configuration, this paper proposed mo...

—There are problems of low delivery radio and high transmission delay in Vehicular Delay-Tolerant Networks (a.b. VDTN. To address these problems, this paper proposes a Vehicular Delay-tolerant Network routing algorithm based on Contention (a.b. VDNC). VDTN algorithm consists of three strategies: the intersection selection strategy based on the Manhattan distance and traffic information, the fi...

In this paper, we consider the problem of dynamically regulating the timing of traffic light controllers in busy cities. We use a Stochastic Fluid Model (SFM) to model the dynamics of the queues formed at an intersection. Based on this model, we derive gradients of the queue lengths with respect to the green/red light lengths within a signal cycle. We report preliminary numerical results compar...

Traffic congestion is a severe problem in many modern cities around the world. To solve the problem, we have proposed a framework for a dynamic and automatic traffic light control expert system combined with a simulation model, which is composed of six submodels coded in Arena to help analyze the traffic problem. The model adopts interarrival time and interdeparture time to simulate the arrival...

In this paper, we develop a simulation optimization algorithm for determining the traffic light signal timings for an intersection of two one-way street traffic flows modeled as single-server queues. The system performance is estimated via stochastic discreteevent simulation, and gradient-based search based on stochastic approximation is applied. In particular, we use smoothed perturbation anal...

nowadays, because of the growing numbers of vehicles on streets and roads, the use of intelligent controlsystems to improve driving safety and health has become a necessity. to design and implement suchcontrol systems, having information about traffic light colors is essential. there are the wide variety oftraffic lights in terms of light intensity and color. therefore it seems that design and ...