This study has three main objectives: 1 to develop new, theory-based, queuing relationships for the quality of flow on two-lane rural highways; 2 to estimate the relationships both from the empirical data that were collected on 15 two-lane rural highways and from the queuing models that were developed; and 3 to propose a new level-of-service variable that measures the quality of the flow both i...

1 Traffic signs are an integral element of any transportation network; however, keeping records of 2 those signs and their conditions is a tedious process, which is both time consuming and labour 3 intensive. As a result, many agencies around the world have been working towards automating the 4 process of sign collection. One form of automation is using remote sensing techniques to extract 5 tr...

In this paper a new approach to the problem of recognizing the preceding vehicle on highways is presented. The system is based on monocular vision. Since on highways the position of the preceding vehicle in the image varies slowly, its previous and current positions are compared using correlation. Such image processing produces a very clear output, which, at a higher level, allows a simple and ...

Intercontinental transport (ICT) of trace substances normally occurs on timescales ranging from a few days to several weeks. In this paper an extraordinary episode in November 2001 is presented, where pollution transport across the North Atlantic took only about one day. The transport mechanism, termed here an intercontinental pollution express highway because of the high wind speeds, was excep...

Recently, there has been immense interest in using unmanned aerial vehicles (UAVs) for civilian operations. As a result, unmanned aerial systems traffic management is needed to ensure the safety and goal satisfaction of potentially thousands of UAVs flying simultaneously. Currently, the analysis of large multi-agent systems cannot tractably provide these guarantees if the agents’ set of maneuve...