A traffic analysis zone definition: a new methodology and algorithm |
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Authors: | Luis M Martínez José Manuel Viegas Elisabete A Silva |
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Institution: | (1) CESUR, Department of Civil Engineering, Instituto Superior Técnico, Lisbon Technical University, Av. Rovisco Pais, 1049-001 Lisbon, Portugal;(2) Department of Land Economy, University of Cambridge, 19 Silver Street, Cambridge, CB3 9EP, UK |
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Abstract: | This paper develops a comprehensive approach to the definition of transportation analysis zones (TAZ), and therein, presents
a new methodology and algorithm for the definition of TAZ embedded in geographic information systems software, improves the
base algorithm with several local algorithms, and comprehensively analyses the obtained results. The results obtained are
then compared to these presently used in the transportation analysis process of the Lisbon Metropolitan Area. The proposed
algorithm presents a new methodology for TAZ design based on a smoothed density surface of geocoded travel demand data. The
algorithm aims to minimise the loss of information when moving from a continuous representation of the origin and destination
of each trip to their discrete representations through zones, and focuses on the trade-off between the statistical precision,
geographical error, and the percentage of intra-zonal trips of the resulting OD matrix. The results for the Lisbon Metropolitan
Area case study suggest a significant improvement in OD matrix estimates compared to current transportation analysis practises
based on administrative units.
Luis M. Martínez
is a Civil Engineer from the Instituto Superior Técnico, Technical University of Lisbon since 2004. After finishing his degree,
he started his work as researcher in the CESUR (Civil Engineering & Architecture Department—Instituto Superior Técnico) where
he has been working since. In 2006 he completed his Master Thesis at Instituto Superior Técnico on Traffic Analysis Zones
modeling and started his PhD studies on the theme: Metropolitan Transportation Systems Financing Using the Value Capture Concept.
José Manuel Viegas
is Full Professor of Transportation at the Civil Engineering & Architecture Department of the Instituto Superior Técnico,
Technical University of Lisbon. He has worked extensively in Modeling, Innovation and Policy in several types of Transport
Systems. He was founder and first Director General of Transportnet, a group of eight leading European Universities with Advanced
Studies in Transportation, and currently leads the Portuguese side of the Transportation Systems area in the MIT—Portugal
program.
Elisabete A. Silva
is at the University of Cambridge (University Lecturer in Planning at the Department of Land Economy and a Fellow of Robinson
College). With more than 100 contributions in peer review journals, books/books chapters, conference proceedings, and a research
track record of approximately 16 years, (both at the public and private sector), her research interests are centred on the
application of new technologies to spatial planning in particular city and metropolitan dynamic modelling through time. |
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Keywords: | TAZ (transportation analysis zones) Transportation planning studies Transportation demand models GIS (geographic information systems) |
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