Intersections constitute one of the most dangerous elements in road systems. Traffic signals remain the most common way to control traffic at high-volume intersections and offer many opportunities to apply intelligent transportation systems to make traffic more efficient and safe. This paper describes an automated method to estimate the temporal exposure of road users crossing the conflict zone...

The primary goal of air traffic control (ATC) is safety of the flights under the controller's responsibility (Mensen 1989, pp. 3-25; Eurocontrol 1999). Such safety requires reliable detection and effective resolution of impending intersections of aircraft trajectories, which are termed ‘conflicts’ if aircraft do not remain separated for at least 5 nautical miles laterally (Mensen 1989) and for ...

A human-in-the-loop experiment was conducted at the NASA Ames and Langley Research Centers, investigating the En Route Free Maneuvering component of a future air traffic management concept termed Distributed Air/Ground Traffic Management (DAG-TM). NASA Langley test subject pilots used the Autonomous Operations Planner (AOP) airborne toolset to detect and resolve traffic conflicts, interacting w...

Rule based traffic management is a methodology for dynamic traffic management that is a joint development of the different road authorities in the Netherlands. The approach tackles operational issues by disentangling problem detection, problem solution and conflict handling for each element in the road network. Each element in the road network follows the same generic rules and defers the traff...

This work deals with the consequences of traffic light control strategies in signalized intersections on the behavior of users, particularly in terms of risk. Traffic light control consists in adapting traffic lights to the variable demand of traffic in order to improve the fluidity and the safety. An adaptive real-time control strategy developed at INRETS has been tested and gave good results ...

BACKGROUND The insurgency tactics that characterize modern warfare, such as suicide car bombs and roadside bombs, have the potential to significantly impact road traffic injuries in conflict affected-countries. As road traffic incidents are one of the top ten causes of death in Iraq, changes in incidence have important implications for the health system. We aimed to describe patterns of road tr...

The paper presents an agent based framework for control of conflict-free scheduling and spacing of airport arrival and approach traffic. The proposed tool incorporates a multi-agent conflict-resolution algorithm that guarantees to arriving aircraft safe approach trajectories, and a dynamic prioritization mechanism that aids in efficient utilization of the available airspace and arrivals runway ...

This paper studies performance metrics that are of use in the evaluation of conflict detection and resolution in air traffic management. The metrics studied are conflict probability and incrossing probability, both of which are closely related to the safety criteria used by the civil aviation community. The main contribution of this paper is to develop mathematical characterisations for these m...

Cockpit displays of traffic information are designed to support pilots’ abilities to perform conflict detection and resolution tasks. Three experiments investigated the effects of display dimensionality, conflict geometry, and time pressure of in-flight conflicts on performance. The results indicated that interactive viewpoints in 2 3–D displays eliminated ambiguity costs, resulting in performa...