738 research outputs found
Big data driven assessment of probe-sourced data
Presently, there is an expanding interest among transportation agencies and state Departments of Transportation to consider augmenting traffic data collection with probe-based services, such as INRIX. The objective is to decrease the cost of deploying and maintaining sensors and increase the coverage under constrained budgets. This dissertation documents a study evaluating the opportunities and challenges of using INRIX data in Midwest. The objective of this study is threefold: (1) quantitative analysis of probe data characteristics: coverage, speed bias, and congestion detection precision (2) improving probe based congestion performance metrics accuracy by using change point detection, and (3) assessing the impact of game day schedule and opponents on travel patterns and route choice.
The first study utilizes real-time and historical traffic data which are collected through two different data sources; INRIX and Wavetronix. The INRIX probe data stream is compared to a benchmarked Wavetronix sensor data source in order to explain some of the challenges and opportunities associated with using wide area probe data. In the following, INRIX performance is thoroughly evaluated in three major criteria: coverage and penetration, speed bias, congestion detection precision.
The second study focuses on the number of congested events and congested hour as two important performance measures. To improve the accuracy and reliability of performance measures, this study addresses a big issue in calculating performance measures by comparing Wavetronix against INRIX. We examine the very traditional and common method of congestion detection and congested hour calculation which utilized a fixed-threshold and we show how unreliable and erroneous that method can be. After that, a novel traffic congestion identification method is proposed in this paper and in the following the number of congested events and congested hour are computed as two performance measures.
After evaluating the accuracy and reliability of INRIX probe data in chapter 2 and 3, the purpose of the last study in chapter 4 is to assess the impacts of game day on travel pattern and route choice behaviors using INRIX, the accurate and reliable data source. It is shown that the impacts vary depending on the schedule and also the opponents. Also, novel methods are proposed for hotspot detection and prediction.
Overall, this dissertation evaluates probe-sourced streaming data from INRIX, to study its characteristics as a data source, challenges and opportunities associated with using wide area probe data, and finally make use of INRIX as a reliable data source for travel behavior analysis
Trucks, Traffic, and Timely Transport: A Regional Freight Logistics Profile
This report justifies and designs a comprehensive tool for describing intraurban trucking, which is the bulk of truck movement in an urban area but typically is unexamined in regional transportation planning. We begin by reviewing literature describing the characteristics and policy issues bearing on freight. We extract from that literature a structure for describing those policy issues, and then go on to design a series of map displays and quantitative measures that provide a linkage between the characteristics of local delivery trucking and the public policy issues that stem from and influence these characteristics. The Regional Freight Logistics Profile (RFLP) emerges as an easy-to-understand yet comprehensive description of urban trucking that stimulates a more constructive dialog among government transportation leaders, shippers, truckers, and the general public. The design balances coverage of the variety of public and business concerns relative to freight against the costs and other practicalities of collecting data. To overcome reluctance on the part of private companies to reveal performance information, we have designed an institutional approach to gathering truck fleet performance data that does not compromise confidential performance data from competing carriers and shippers. We recommend that metropolitan planning organizations, as well as state and federal freight mobility offices with responsibility for technical assistance to MPOs, review the RFLP design for potential adaptation and adoption
Internal report cluster 1: Urban freight innovations and solutions for sustainable deliveries (2/4)
Technical report about sustainable urban freight solutions, part 2 of
Passenger Flows in Underground Railway Stations and Platforms, MTI Report 12-43
Urban rail systems are designed to carry large volumes of people into and out of major activity centers. As a result, the stations at these major activity centers are often crowded with boarding and alighting passengers, resulting in passenger inconvenience, delays, and at times danger. This study examines the planning and analysis of station passenger queuing and flows to offer rail transit station designers and transit system operators guidance on how to best accommodate and manage their rail passengers. The objectives of the study are to: 1) Understand the particular infrastructural, operational, behavioral, and spatial factors that affect and may constrain passenger queuing and flows in different types of rail transit stations; 2) Identify, compare, and evaluate practices for efficient, expedient, and safe passenger flows in different types of station environments and during typical (rush hour) and atypical (evacuations, station maintenance/ refurbishment) situations; and 3) Compile short-, medium-, and long-term recommendations for optimizing passenger flows in different station environments
Stuck Between Great Powers: The Geopolitics of the Peripheries
In recent years there are clear signs of the reemergence
of geopolitics and the rise of great power rivalry as a result of the multipolarisation of the international order. This volume is focusing on the less visible actors and
regions of the international arenas, the global
peripheries, and smaller countries. The ambition
of the present collection of studies is to
introduce the reader to some of the special
geopolitical characteristics of these regions
and countries. Even though the topics are
intentionally varied, with a wide regional focus,
the reader can recognise similar patterns within
the chapters. The authors of the studies are representing a
new generation of young researchers connected to the Department of Geography, Geoeconomy, and Sustainable Development at Corvinus University of Budapest
Just Green Transitions and Global Labour Organisations
This report presents the findings from two research projects undertaken under the programme Adapting Canadian Work and Workplaces to Respond to Climate Change: Canada in International Perspective, based in York University, Ontario, Canada
Universal Design and Visitability: from Accessibility to Zoning
National Endowment for the Art
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