In this paper a fuzzy approach is proposed to reduce delay at isolated intersections by using as indicator the intersection saturation degree. The proposed system combines fixed -duration cycle and fuzzy calculus to reduce the overall delay without giving too much penalty to some traffic streams. To obtain the intended goal, the green times are modified according to the measured traffic flow va...

This paper presents an on-going research focused on providing artificial intelligence to a traffic light controller. RACE intends to use this intelligent traffic light in its small educative traffic safety village, in which students exercise practices using traffic signs (vertical and horizontal) and traffic lights. One intersection in this village is controlled by traffic lights and the Univer...

The operations of freeway ramp metering and urban traffic network signal control are independent in most areas. Such situation may cause some conflict between traffic streams of the two subsystems, or, at least, their dynamic interactions have not been taken into account from an overall system viewpoint. Traffic performance can be improved if the controls of these two subnetworks are integrated...

Vehicular Ad-hoc Networks (VANETs) are attracting considerable attention from the research community and the automotive industry to improve the services of Intelligent Transportation System (ITS). As today’s transportation system faces serious challenges in terms of road safety, efficiency, and environmental friendliness, the idea of so called “ITS” has emerged. Due to the expensive cost of dep...

Intelligent control in road traffic intersections can be an alternative to a conventional control where duration of each signal phase is predetermined. In this article fuzzy logic approach for traffic signals control is considered and applied for an isolated intersection. Number of vehicles in each lane is measured with loop detectors. At the end of each phase these numbers are used as inputs t...

To avoid the limitations of centralized communication systems for transportation (e.g. response time, scaling to very large numbers of vehicles, privacy), it is commonly admitted that local applications should rely on local communication, i.e. ad-hoc mobile networks. A typical scenario is an intersection regulated by traffic lights (see below). Vehicles establishing communication in the vicinit...

• From work, you give your house a call on your videophone. The house answers, and you punch in your access code. You open up the kitchen camera and, sure enough, there is your brief­ case on the table, just where you forgot it. • You're backing your car into a tight spot. Where is that curb? You flip on the right rear bumper camera and see that you are a few feet short of the curb and slowly b...

Traffic light timing optimization is still an active line of research despite the wealth of scientific literature on the topic, and the problem remains unsolved for any non-toy scenario. One of the key issues with traffic light optimization is the large scale of the input information that is available for the controlling agent, namely all the traffic data that is continually sampled by the traf...

A route-based signal preemption strategy is developed to provide the most efficient and safe route for an emergency vehicle under a given network and traffic conditions. It combines an on-line route selection procedure and a dynamic sequential preemption method. The on-line route selection module first quantifies the level of congestion for each link on a given network using a congestion index ...