Robert L. Bertini

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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)
In this paper a new method for real time estimation of vehicular flows and densities on motorways is proposed. This method is based on fusing traffic counts with mobile phone counts. The procedure used for the estimation of traffic flow parameters is based on the hypothesis that " instrumented " vehicles can be counted on specific motorway sections and(More)
Transit signal priority (TSP) can reduce transit delay at signalized inter­ sections by making phasing adjustments. TSP is a relatively inexpensive and easily implemented tool to make transit service faster and more reli­ able. TSP also sends a signal that a city or region encourages the growth of transit. With the aim of assessing the performance of an(More)
Quantifying the joint impacts of stop locations, signalized intersections, and traffic conditions on bus travel time for personal use only and shall not be self-archived in electronic repositories. If you wish to self-archive your article, please use the accepted manuscript version for posting on your own website. You may further deposit the accepted(More)
Details of traffic evolution were studied upstream and downstream of a freeway bottleneck located near a busy on-ramp. It is shown that on certain days the bottleneck became active upon dissipation of a queue emanating from somewhere further downstream. On such occasions, the bottleneck occurred at a fixed location, approximately one kilometer downstream of(More)
Travel time estimation is a critical ingredient for transportation management and traveler information—both infrastructure-based and in-vehicle. Infrastructure managers and operators are interested in estimating optimal freeway sensor density for new construction and retrofits. Focusing on freeway travel time estimation for display on roadside variable(More)
Pre-Timed Ramp Metering (PRM) is a traffic management technique. The Oregon Department of Transportation (ODOT) currently operates a comprehensive Advanced Traffic Management System (ATMS). ATMS collects data from various sources and archives it for later usage. In this paper we demonstrate several techniques for measuring and assessing the performance of(More)
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