Mapping transit‐based access: integrating GIS, routes and schedules

Accessibility is a concept that is not entirely easy to define. Gould (1969) once stated that it is a ‘slippery notion … one of those common terms that everyone uses until faced with the problem of defining and measuring it’. Considerable research over the last 40 years has been devoted to defining and measuring accessibility, ranging from access to jobs within an hour's travel time to the ease at which given places can be reached. This article is concerned with the measurement of access provided by transit. It includes a review of past work on measuring accessibility in general and with respect to transit services in particular. From this overview of the literature, it can be seen that current methods fall short in measuring transit service access in several meaningful aspects. Based on this review and critique, we propose new refinements that can be used to help overcome some of these shortcomings. As a part of this, we define an extended GIS data structure to handle temporal elements of transit service. To demonstrate the value of these new measures, examples are presented with respect to mapping accessibility of transit services in Santa Barbara, California. Finally, we show how these measures can be used to develop a framework for supporting transit service analysis and planning.

[1]  Q. Shen,et al.  Location Characteristics of Inner-City Neighborhoods and Employment Accessibility of Low-Wage Workers , 1998 .

[2]  J. Weibull.  An axiomatic approach to the measurement of accessibility , 1976 .

[3]  T. Hägerstrand.  What about people in Regional Science? , 1970 .

[4]  Alan T. Murray,et al.  Optimizing Public Transit Quality and System Access: The Multiple-Route, Maximal Covering/Shortest-Path Problem , 2005 .

[5]  Richard Hillman,et al.  GIS-based innovations for modelling public transport accessibility , 1997 .

[6]  M. Kwan.  Space-time and integral measures of individual accessibility: a comparative analysis using a point-based framework , 2010 .

[7]  Itzhak Omer,et al.  Evaluating accessibility using house-level data: A spatial equity perspective , 2006, Comput. Environ. Urban Syst..

[8]  Xuan Zhu,et al.  Accessibility Analyst: An Integrated GIS Tool for Accessibility Analysis in Urban Transportation Planning , 2004 .

[9]  Stan C. M. Geertman,et al.  GIS and Models of Accessibility Potential: An Application in Planning , 1995, Int. J. Geogr. Inf. Sci..

[10]  Harry J. P. Timmermans,et al.  Multistop-Based Measurements of Accessibility in a GIS Environment , 1994, Int. J. Geogr. Inf. Sci..

[11]  Fahui Wang,et al.  Measures of Spatial Accessibility to Health Care in a GIS Environment: Synthesis and a Case Study in the Chicago Region , 2003, Environment and planning. B, Planning & design.

[12]  F. Benjamin Zhan,et al.  Shortest Path Algorithms: An Evaluation Using Real Road Networks , 1998, Transp. Sci..

[13]  Edward A Beimborn,et al.  Accessibility, Connectivity, and Captivity: Impacts on Transit Choice , 2003 .

[14]  C. Gent,et al.  Advances in public transport accessibility assessments for development control - a proposed methodology , 2005 .

[15]  Gerald Barber,et al.  AGGGREGATE CHARACTERISTICS OF URBAN TRAVEL. , 1995 .

[16]  Mizuki Kawabata,et al.  Job Access and Employment among Low-Skilled Autoless Workers in US Metropolitan Areas , 2003 .

[17]  Harvey J. Miller,et al.  GIS Software for Measuring Space-Time Accessibility in Transportation Planning and Analysis , 2000, GeoInformatica.

[18]  J. V. Eck,et al.  Accessibility analysis and spatial competition effects in the context of GIS-supported service location planning , 1999 .

[19]  Rajat Rastogi,et al.  Defining transit accessibility with environmental inputs , 2003 .

[20]  Horst W. Hamacher,et al.  Modeling of building evacuation problems by network flows with side constraints , 1988 .

[21]  Q. Shen,et al.  Job Accessibility as an Indicator of Auto-Oriented Urban Structure: A Comparison of Boston and Los Angeles with Tokyo , 2006 .

[22]  Irene Casas,et al.  Evaluating the importance of accessibility to congestion response using a GIS-based travel simulator , 2003, J. Geogr. Syst..

[23]  J. G. Koenig,et al.  Indicators of urban accessibility: Theory and application , 1980 .

[24]  M. Moseley,et al.  RURAL ACCESSIBILITY: THE ROLE OF THE MOTOR CAR , 1979 .

[25]  L. Anselin,et al.  Assessing Spatial Equity: An Evaluation of Measures of Accessibility to Public Playgrounds , 1998 .

[26]  Mei-Po Kwan,et al.  Network-based constraints-oriented choice set formation using GIS , 1998 .

[27]  W. G. Hansen.  How Accessibility Shapes Land Use , 1959 .

[28]  Harvey J. Miller,et al.  Modelling accessibility using space-time prism concepts within geographical information systems , 1991, Int. J. Geogr. Inf. Sci..

[29]  Eric Sheppard,et al.  MODELING AND PREDICTING AGGREGATE FLOWS , 1986 .

[30]  Alan T. Murray,et al.  Strategic route extension in transit networks , 2006, Eur. J. Oper. Res..

[31]  Tom de Jong,et al.  Location profile-based measures as an improvement on accessibility modelling in GIS , 1996 .

[32]  Alan T. Murray.  Strategic analysis of public transport coverage , 2001 .

[33]  Alastair M. Morrison,et al.  Using desktop GIS for the investigation of accessibility by public transport: an isochrone approach , 2000, Int. J. Geogr. Inf. Sci..

[34]  M. Kwan.  Gender and Individual Access to Urban Opportunities: A Study Using Space–Time Measures , 1999 .

[35]  Gregory L. Thompson,et al.  Identifying Gainers and Losers from Transit Service Change: A Method Applied to Sacramento , 1998 .

[36]  K. V. Krishna Rao,et al.  SURVEY DESIGN FOR STUDYING TRANSIT ACCESS BEHAVIOR IN MUMBAI CITY, INDIA , 2002 .

[37]  S. Hanson,et al.  Accessibility and Intraurban Travel , 1987 .

[38]  D. R. Ingram.  The concept of accessibility: A search for an operational form , 1971 .

[39]  Zhong-ren Peng.  A methodology for design of a GIS-based automatic transit traveler information system , 1997 .

[40]  Morton E. O'Kelly,et al.  Recent advances in accessibility research: Representation, methodology and applications , 2003, J. Geogr. Syst..

[41]  Luis Ferreira,et al.  PUBLIC TRANSPORTATION ACCESS , 1998 .

[42]  Richard L James R Church,et al.  Measuring Accessibility for People with a Disability , 2002 .

[43]  Ram M. Pendyala,et al.  Development of Time-of-Day–Based Transit Accessibility Analysis Tool , 2002 .

[44]  Joseph Ferreira,et al.  Using GIS tools to improve transit ridership on routes serving large employment centers: The Boston South End Medical Area case study , 1994 .

[45]  Torsten Hägerstraand.  WHAT ABOUT PEOPLE IN REGIONAL SCIENCE , 1970 .

[46]  P. Gould,et al.  Spatial Diffusion, Resource Paper No. 4. , 1969 .

[47]  Richard L. Church,et al.  Finding shortest paths on real road networks: the case for A* , 2009, Int. J. Geogr. Inf. Sci..

[48]  Mei-Po Kwan,et al.  Space-time accessibility measures: A geocomputational algorithm with a focus on the feasible opportunity set and possible activity duration , 2003, J. Geogr. Syst..

[49]  M. Wachs,et al.  PHYSICAL ACCESSIBILITY AS A SOCIAL INDICATOR , 1973 .

[50]  Timothy L. Nyerges.  GEOGRAPHICAL INFORMATION SYSTEM SUPPORT FOR URBAN/REGIONAL TRANSPORTATION ANALYSIS. , 1995 .

[51]  Brian W. Baetz,et al.  Using GIS for Evaluation of Neighborhood Pedestrian Accessibility , 1997 .

[52]  J. M. Morris,et al.  Accessibility indicators for transport planning , 1979 .

[53]  Debbie A. Niemeier,et al.  Measuring Accessibility: An Exploration of Issues and Alternatives , 1997 .