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Non-recurring roadway traffic incidents are a part of everyday life that impedes normal traffic flow. One of the major challenges is to reroute traffic around incidents in order to maximize throughput. This often comes up when an incident occurs on a freeway and alternate routes need to be utilized on city and residential streets. Today's navigational devices can be used to find alternate routes based...
The popularity of surveillance cameras used in traffic management systems have produced large quantities of video data that cannot be processed easily by humans. We present a method used on high resolution traffic surveillance videos to track and estimate vehicles' state when the cameras are mounted on moderate height structures typically less than 10 meters. This tracking method enables a number...
Vehicle fuel consumption and emissions are directly related to the acceleration/deceleration patterns and the idling period. In order to reduce emissions and improve fuel economy, sharp acceleration/deceleration and idling should be avoided as much as possible. Unlike on freeways, traffic on signalized corridors suffers from increased fuel consumption and emissions due to idling and acceleration/deceleration...
Freeway management systems are becoming increasingly important, serving as a core of many intelligent transportation system (ITS) applications. Advancement in various areas of traffic monitoring system technology has provided planners and engineers with rich sets of traffic data, both macroscopically and microscopically, that can be used to achieve even better freeway management. In this paper, we...
Roadway navigation systems have become increasingly popular, providing efficient routing through a roadway network. In most cases, routes are selected by minimizing some cost function, such as time or distance. However, a shortest-duration or shortest-distance route may not always work well due to unexpected roadway infrastructure conditions (e.g. unscheduled road shutdown) or major traffic problems,...
Freeway management systems are becoming increasingly important for many ITS applications. To achieve better freeway management, effective traffic performance evaluation parameters are crucial. Most of the current evaluation parameters are from a macroscopic point of view, e.g., level-of-service based on traffic density. This paper proposes evaluation parameters in a microscopic way and investigates...
One of the major successes in ITS technology lately has been in the area of advanced traveler information systems (ATIS). In particular, there are now many good navigation systems that can advise drivers on route selection within a roadway network. This type of navigation software is now available on the Internet that can be used for trip planning, as well as in on-board navigation systems that can...
Excessive vehicle speed on today's roadways often results in accidents, high fuel consumption rates, and excessive pollutant emissions. Traditional methods of limiting speed have only been moderately effective. Using the latest intelligent transportation technology, speed enforcement can be enhanced through vehicle speed management programs, often referred to as intelligent speed adaptation (ISA)...
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