Traffic light control is one of the main means of controlling road traffic. Improving traffic control is important because it can lead to higher traffic throughput and reduced congestion. This chapter describes multiagent reinforcement learning techniques for automatic optimization of traffic light controllers. Such techniques are attractive because they can automatically discover efficient con...

This paper proposes a multiple exposure images based traffic light recognition method. For traffic light recognition, color segmentation is widely used to detect traffic light signals; however, the color in an image is easily affected by various illuminations and leads to incorrect recognition results. In order to overcome the problem, we propose the multiple exposure technique which enhances t...

In this paper we investigate Gaussian queues in the light-traffic and in the heavy-traffic regime. Let Q X ≡ {Q X (t) : t ≥ 0} denote a stationary buffer content process for a fluid queue fed by the centered Gaussian process X ≡ {X(t) : t ∈ R} with stationary increments, X(0) = 0, continuous sample paths and variance function σ 2(·). The system is drained at a constant rate c > 0, so that for a...

We consider Markov Decision Processes under light traffic conditions. We develop an algorithm to obtain asymptotically optimal policies for both the total discounted and the average reward criterion. This gives a general framework for several light traffic results in the literature. We illustrate the method by deriving the asymptotically optimal control of a simple ATM network.

A number of emerging dynamic traffic analysis applications, such as regional or statewide traffic assignment, require a theoretically rigorous and computationally efficient model to describe the propagation and dissipation of system congestion with bottleneck capacity constraints. An open-source light-weight dynamic traffic assignment (DTA) package, namely DTALite, has been developed to allow a...

The dynamic traffic-grooming problem in wavelength routed networks is generally a two-layered routing problem in which traffic connections are routed over light paths in the virtual topology layer and light paths are routed over physical links in the physical topology layer. Traffic grooming for multicast communication in WDM networks has received very little attention to date. In this paper, w...

OBJECTIVES To determine the accuracy of a clinical decision rule (the traffic light system developed by the National Institute for Health and Clinical Excellence (NICE)) for detecting three common serious bacterial infections (urinary tract infection, pneumonia, and bacteraemia) in young febrile children. DESIGN Retrospective analysis of data from a two year prospective cohort study SETTING...

It is easy to control traffic light system on highways but difficult in urban areas. This problem can be solved by decreasing the stoppage time at the junction to zero, instead of broaden the available traffic network. In this paper, different tools or algorithm are used and everyone has its own contribution in solving the traffic light system. Here sensors are used to control the speed of cars...