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Articles 1 - 9 of 9
Full-Text Articles in Urban Studies and Planning
An Introduction To The Nacto Urban Street Design: Changing The Dna Of City Streets, Peter Koonce
An Introduction To The Nacto Urban Street Design: Changing The Dna Of City Streets, Peter Koonce
PSU Transportation Seminars
In this seminar Peter will summarize his contributions to the NACTO Urban Street Design Guide, a guidebook focused on a paradigm shift in transportation, pulling away from the traditional bias toward highway designs that do not always meet the complex needs of streets in cities.
Federal Transit Administration's Impact On Public Transportation In The United States, Amy Changchien
Federal Transit Administration's Impact On Public Transportation In The United States, Amy Changchien
PSU Transportation Seminars
The Federal Transit Administration invests in building the capacity and improving the quality of public transportation throughout the United States of America. Under FTA's leadership, public rail, bus, trolley, ferry, and other transit services have reached greater levels of safety, reliability, availability, and accessibility. Come hear the highlights of FTA's impacts and participate in an interactive question/answer session and discussion on career options in public transportation.
Improving Travel Information Products Via Robust Estimation Techniques, David Maier, Kristin A. Tufte, Rafael J. Fernández Moctezuma
Improving Travel Information Products Via Robust Estimation Techniques, David Maier, Kristin A. Tufte, Rafael J. Fernández Moctezuma
TREC Final Reports
Traffic-monitoring systems, such as those using loop detectors, are prone to coverage gaps, arising from sensor noise, processing errors and transmission problems. Such gaps adversely affect the accuracy of Advanced Traveler Information Systems. This project will explore models based on historical data that can provide estimates to fill such gaps. We build on an initial study by Mr. Rafael J. Fernandez-Moctezuma, using both a linear model and an artificial neural network (ANN) trained on historical data to estimate values for reporting gaps. These initial models were 80% and 89% accurate, respectively, in estimating the correct speed range, and misclassifications were …
Building And Maintaining A Statewide Transportation Framework, Kenneth Dueker, Paul Bender
Building And Maintaining A Statewide Transportation Framework, Kenneth Dueker, Paul Bender
Center for Urban Studies Publications and Reports
Creating and maintaining up-to-date sharable Geographic Information SystemsTransportation (GIS-T) data is challenging. Many states are working on Transportation Framework efforts to build a complete, consistent, and current transportation data layer in conjunction with the NSDI and Geospatial One-Stop efforts. This paper summarizes an effort that systematically re-examined transportation data sharing issues as part of the development of a Transportation Framework for the State of Washington. Business needs were assessed in terms of spatial and temporal accuracy needs of stakeholders and users of a state-wide Transportation Framework. A conceptual model was developed for a Transportation Framework with emphasis on data flows …
Time Point-Level Analysis Of Passenger Demand And Transit Service Reliability, Thomas J. Kimpel, James G. Strathman, Kenneth Dueker
Time Point-Level Analysis Of Passenger Demand And Transit Service Reliability, Thomas J. Kimpel, James G. Strathman, Kenneth Dueker
Center for Urban Studies Publications and Reports
This paper provides a framework for analyzing transit service reliability and estimating passenger demand at the time point-level of analysis. It begins with a literature review of passenger demand modeling and transit service reliability analysis, and shows how advances in transportation technologies are producing vast amounts of data that encourage the use of new modeling techniques. Differences between route-level and time point-level demand modeling are discussed. Lastly, the results of the passenger demand and transit service reliability models estimated from Tri-Met BDS data are presented.
A Framework For Gis-T Data Sharing, Kenneth Dueker, J. Allison Butler
A Framework For Gis-T Data Sharing, Kenneth Dueker, J. Allison Butler
Center for Urban Studies Publications and Reports
This paper develops a framework and principles for sharing of transportation data. The framework is intended to clarify roles among participants, data producers, data integrators, and data users. The principles are intended to provide guidance for the participants. Both the framework and the principles are based on an enterprise GIS-T data model that defines relations among transportation data elements. The data model guards against ambiguities and provides a basis for the development of the framework and principles for sharing of transportation data. There are two central principles. First is the uncoupling of graphics, topology, position, and characteristics. Second is the …
Sharing Transportation Gis Data, Kenneth Dueker, Paul Bender, Jihong Zhang
Sharing Transportation Gis Data, Kenneth Dueker, Paul Bender, Jihong Zhang
Center for Urban Studies Publications and Reports
Updating and maintaining Geographic Information Systems-Transportation data (GIS-T data) is proving difficult. Different database formats needed to support diverse applications leads to inconsistencies and inaccuracies, and duplication in updating. Dueker and Butler (1998) have proposed an Enterprise GIS-T data model that unbundles the various components of transportation data (network links, cartography, and attributes) to facilitate generating application-specific networks, and which eases updating and maintenance. However, developers of existing application-specific databases that employ integrated data models that bundle the network link with cartography and attributes are reluctant to step back to an intermediate form for managing their data. Consequently, attention is …
A Primer On Gis-T Databases, J. Allison Butler, Kenneth Dueker
A Primer On Gis-T Databases, J. Allison Butler, Kenneth Dueker
Center for Urban Studies Publications and Reports
This paper describes the primary database design approaches that have been and are being used in geographic information system applications for transportation (GIS-T). While not intending to be exhaustive, the paper covers the primary approaches used in federal, state, and local transportation agencies.
Issues In Calculating Traffic Impact Fees: A Review Of The Literature, Anthony M. Rufolo, Catherine T. Lawson
Issues In Calculating Traffic Impact Fees: A Review Of The Literature, Anthony M. Rufolo, Catherine T. Lawson
Center for Urban Studies Publications and Reports
Over time, the concern has grown that government is not funding infrastructure investment in United States at a sufficient level. Funding of infrastructure has been a joint effort of all levels of government, but reductions in the federal contribution (after adjusting for inflation) have shifted more of the cost onto state and local governments. Many studies have identified massive funding requirements that are not being met. The failure to meet requirements would be rational if they are based on standards of service which are set unrealistically high or on other conceptual errors; however, failure to provide the funding likely to …