Category Archives: Open Source

Developing a Comprehensive US Transit Accessibility Database

Recent working paper:

Transit Accessibility in Minneapolis
Transit Accessibility in Minneapolis

Owen, A. and Levinson, D. (2014) Developing a Comprehensive US Transit Accessibility Database

  • This paper discusses the development of a national public transit accessibility evaluation framework, focusing on lessons learned, data source evaluation and selection, calculation methodology, and examples of accessibility evaluation results. In both practice and in research, accessibility evaluation remains experimental and methodologically fragmented. This heightens the “first mover” risk for agencies seeking to implement accessibility-based planning practices, as they must select a method which might produce results that can only be interpreted locally. Development of a common baseline accessibility metric could advance the use of accessibility- based planning. The accessibility evaluation framework described here builds on methods developed in earlier project, extended for use on a national scale and at the Census block level. Application on a national scale involves assembling and processing a comprehensive national database of public transit network topology and travel times. This database incorporates the significant computational advancement of calculating accessibility continuously for every minute within a departure time window of interest. Values for contiguous departure time spans can then be averaged or analyzed for variance over time. This significantly increases computational complexity, but provides a very robust representation of the interaction between transit service frequency and accessibility at multiple departure times.

Simulating Cities with OpenStreetMap and OpenTripPlanner Analyst


From State of the Map 2014, a Video by Kevin Webb of Conveyal

In this session I will discuss transport accessibility modeling using OpenStreetMap and OpenTripPlanner Analyst.

Accessibility analysis techniques are one of a suite of tools used by transport planners to understand the efficiency of a city authority’s transportation system, and to inform decision-making about transport service planning.

The goal of the OTPA project is to produce quantitative indicators that inform debate and decision-making processes by revealing hidden dimensions of the relationship between transportation and land use.

We are using and extending OTP as part of the Accessibility Observatory.

Announcing the Journal of Transport and Land Use

Announcing the
Journal of Transport and Land Use

www.jtlu.org – ISSN 1938-7849

The Journal of Transport and Land Use is a new open-access, peer-reviewed online journal publishing original inter-disciplinary papers on the interaction of transport and land use. Domains include: engineering, planning, modeling, behavior, economics, geography, regional science, sociology, architecture and design, network science, and complex systems.


Summer 2008 issue available: www.jtlu.org

Contents:

Sprawl and Accessibility
Martin Bruegmann, Professor of Art History, Architecture, and Urban Planning, University of Illinois at Chicago
(Author of Sprawl: A Compact History)

Counterpoint: Sprawl and Accessibility
Randall Crane, UCLA Department of Urban Planning
(Co-editor of the forthcoming Oxford Handbook of Urban Planning)

Cities as Organisms: Allometric Scaling of Urban Road Networks
Horacio Samaniego and Melanie E. Moses, Department of Computer Science, University of New Mexico

A Use-Based Measure of Accessibility to Linear Features to Predict Urban Trail Use
John R. Ottensmann and Greg Lindsey, Center for Urban Policy and the Environment, Indiana University-Purdue University Indianapolis

Integral Cost-Benefit Analysis of Maglev Rail Projects Under Market Imperfections
J. Paul Elhorst and Jan Oosterhaven, Department of Regional Economics, University of Groningen (Netherlands)


To learn more about the Journal of Transport and Land Use, visit www.jtlu.org or contact:
David Levinson, General Editor: dlevinson@umn.edu
Kevin Krizek, Editor (Americas): krizek@colorado.edu

The Journal is housed at the University of Minnesota and sponsored by the Center for Transportation Studies.