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Travel time estimation is of increasing importance to travelers and transportation professionals alike as congestion worsens in major urban areas. In fact, the reliability of travel time estimates on a given corridor may be more important for travelers, shippers, and transport managers than the travel time itself. This paper examines the uses of measured(More)
In recent years, the techniques for screening transportation networks to identify high crash locations have become more sophisticated. Many transportation agencies, however, lack sufficient data, either in timeliness, completeness, or accuracy to implement many of the recent advances. This paper presents the results of an empirical analysis of screening and(More)
Measuring the performance of a transit system is the first step toward efficient and proactive management. Since 1990, the use of performance measures for transportation planning and operations has gained a great deal of attention, particularly as transportation agencies are required to provide service with diminishing resources. In the past, it was very(More)
To address increasing traffic congestion and its associated consequences, traffic managers are turning to intelligent transportation management. The <i>latte</i> project is extending data stream technology to handle queries that combine live streams with large data archives, motivated by needs in the Intelligent Transportation Systems (ITS) domain. In(More)
The arrival times of vehicles traveling southbound along a two-lane, bi-directional highway were recorded at eight neighboring locations upstream of a bottleneck caused by an oversaturated traffic signal. Cumulative curves constructed from these observations describe completely and in great detail the evolution of the resulting long queues. These queues(More)
7 Abstract 8 In this paper a new method for real time estimation of vehicular flows and densities on motorways is proposed. This 9 method is based on fusing traffic counts with mobile phone counts. The procedure used for the estimation of traffic flow 10 parameters is based on the hypothesis that ''instrumented'' vehicles can be counted on specific motorway(More)
INTRODUCTION Computer processing advances have led to the increased use of traffic simulation models. Depending on the simulation objectives, models range from macroscopic models that use traffic descriptors such as flow, density and speed to microscopic models, which detail the movement of individual vehicles. (1) Macroscopic models are generally applied(More)