{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,7,6]],"date-time":"2026-07-06T16:45:00Z","timestamp":1783356300750,"version":"3.54.6"},"reference-count":58,"publisher":"MDPI AG","issue":"5","license":[{"start":{"date-parts":[[2025,5,17]],"date-time":"2025-05-17T00:00:00Z","timestamp":1747440000000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"Funda\u00e7\u00e3o para a Ci\u00eancia e a Tecnologia (FCT\u2014The Portuguese Foundation for Science and Technology)","award":["UIDB\/00308\/2020"],"award-info":[{"award-number":["UIDB\/00308\/2020"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["IJGI"],"abstract":"<jats:p>Service, or catchment areas of public transport stops are traditionally assessed using Euclidean or network distances, often neglecting other relevant factors such as topography. This study proposes a refined approach that integrates network-based accessibility with terrain variations and the effect they have on walking time and on the physical effort required for pedestrian movement. Using geographic information systems-based analysis that include walking time and walking energy cost models, the impact of topography on accessibility to public transport is evaluated in a case study of the hilly city of Coimbra, Portugal. Results show that, as compared to their flat counterparts, network distance-based service areas that consider hilliness, exhibit a decrease in accessibility of circa 10% in terms of area covered and population affected. These findings highlight the need for more realistic accessibility assessments to support more realistic and equitable public transport planning. Because extensive network datasets are not always available to decision-makers, this article also introduces the concept of surrogate buffers as a practical alternative for obtaining catchment areas, summarized by the \u201c0.7\/0.6R rule\u201d.<\/jats:p>","DOI":"10.3390\/ijgi14050205","type":"journal-article","created":{"date-parts":[[2025,5,19]],"date-time":"2025-05-19T05:37:13Z","timestamp":1747633033000},"page":"205","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":5,"title":["Walking to Public Transport: Rethinking Catchment Areas Considering Topography and Surrogate Buffers"],"prefix":"10.3390","volume":"14","author":[{"given":"Filipe","family":"Pais","sequence":"first","affiliation":[{"name":"Institute for Systems Engineering and Computers of Coimbra (INESCC), 3030-290 Coimbra, Portugal"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-2681-5035","authenticated-orcid":false,"given":"Nuno","family":"Sousa","sequence":"additional","affiliation":[{"name":"Institute for Systems Engineering and Computers of Coimbra (INESCC), 3030-290 Coimbra, Portugal"},{"name":"Department of Sciences and Technology, Universidade Aberta, 1250-100 Lisbon, Portugal"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-1664-5869","authenticated-orcid":false,"given":"Jo\u00e3o","family":"Monteiro","sequence":"additional","affiliation":[{"name":"Institute for Systems Engineering and Computers of Coimbra (INESCC), 3030-290 Coimbra, Portugal"},{"name":"Research Center for Territory, Transports and Environment (CITTA), 4200-465 Porto, Portugal"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-9311-5584","authenticated-orcid":false,"given":"Jo\u00e3o","family":"Coutinho-Rodrigues","sequence":"additional","affiliation":[{"name":"Institute for Systems Engineering and Computers of Coimbra (INESCC), 3030-290 Coimbra, Portugal"},{"name":"Department of Civil Engineering, University of Coimbra, 3004-531 Coimbra, Portugal"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-6213-386X","authenticated-orcid":false,"given":"Eduardo","family":"Natividade-Jesus","sequence":"additional","affiliation":[{"name":"Institute for Systems Engineering and Computers of Coimbra (INESCC), 3030-290 Coimbra, Portugal"},{"name":"Department of Civil Engineering, Polytechnic Institute of Coimbra, 3045-093 Coimbra, Portugal"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2025,5,17]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"102461","DOI":"10.1016\/j.trd.2020.102461","article-title":"Equity of Transit Accessibility across Chicago","volume":"86","author":"Ermagun","year":"2020","journal-title":"Transp. Res. Part D Transp. Environ."},{"key":"ref_2","doi-asserted-by":"crossref","first-page":"24","DOI":"10.1016\/j.jtrangeo.2018.01.005","article-title":"Assessing Public Transit Service Equity Using Route-Level Accessibility Measures and Public Data","volume":"67","author":"Karner","year":"2018","journal-title":"J. Transp. Geogr."},{"key":"ref_3","doi-asserted-by":"crossref","first-page":"88","DOI":"10.1016\/j.cities.2019.01.031","article-title":"Justice in Public Transport Systems: A Comparative Study of Auckland, Brisbane, Perth and Vancouver","volume":"90","author":"Chowdhury","year":"2019","journal-title":"Cities"},{"key":"ref_4","doi-asserted-by":"crossref","first-page":"806","DOI":"10.1177\/03611981231170005","article-title":"Evaluating Social Equity of Transit Accessibility: A Case of Salt Lake County, U.S","volume":"2677","author":"Zinia","year":"2023","journal-title":"Transp. Res. Rec."},{"key":"ref_5","doi-asserted-by":"crossref","first-page":"106096","DOI":"10.1016\/j.scs.2024.106096","article-title":"Can Proximity Forge Strong Bonds? Exploring the Relationship between Urban Proximity and Social Cohesion at the Neighbourhood Level","volume":"119","author":"Mombelli","year":"2025","journal-title":"Sustain. Cities Soc."},{"key":"ref_6","doi-asserted-by":"crossref","unstructured":"Monteiro, J., Para, M., Sousa, N., Natividade-Jesus, E., Ostorero, C., and Coutinho-Rodrigues, J. (2023). Filling in the Spaces: Compactifying Cities towards Accessibility and Active Transport. ISPRS Int. J. Geo-Inf., 12.","DOI":"10.3390\/ijgi12030120"},{"key":"ref_7","doi-asserted-by":"crossref","first-page":"134","DOI":"10.1080\/13574809.2019.1592665","article-title":"Urban Design and Public Transportation\u2014Public Spaces, Visual Proximity and Transit-Oriented Development (TOD)","volume":"25","author":"Stojanovski","year":"2020","journal-title":"J. Urban Des."},{"key":"ref_8","doi-asserted-by":"crossref","first-page":"022107","DOI":"10.1088\/1757-899X\/1203\/2\/022107","article-title":"Transportation Network Spatial Analysis to Measure Pedestrian Suitability. The Case of Hilly Cities","volume":"1203","author":"Nogueira","year":"2021","journal-title":"IOP Conf. Ser. Mater. Sci. Eng."},{"key":"ref_9","doi-asserted-by":"crossref","unstructured":"Shi, Z., Zhou, C., Cheng, L., He, M., and Liu, Y. (2024). Examining Spatial Variations in Walking Activity Among Older Adults Considering the Impact of Topographical Characteristics. Transp. Res. Rec. 0(0).","DOI":"10.1177\/03611981241302339"},{"key":"ref_10","unstructured":"Karel, M. (2016). Transport Justice: Designing Fair Transportation Systems, Routledge."},{"key":"ref_11","doi-asserted-by":"crossref","first-page":"01006","DOI":"10.1051\/matecconf\/202439001006","article-title":"Sustainable Societal Transformation: Shaping Renewable Energy Technologies in Transport","volume":"390","author":"Kunskaja","year":"2024","journal-title":"MATEC Web Conf."},{"key":"ref_12","first-page":"125","article-title":"Planning Cities for Pandemics: Review of Urban and Transport Planning Lessons from COVID-19","volume":"176","author":"Monteiro","year":"2023","journal-title":"Proc. Inst. Civ. Eng.\u2014Munic. Eng."},{"key":"ref_13","first-page":"2083","article-title":"The Impact of Regional Structure and Topography on the Effectiveness of Public Transportation Services","volume":"2","author":"Ilham","year":"2024","journal-title":"West Sci. Social. Humanit. Stud."},{"key":"ref_14","doi-asserted-by":"crossref","first-page":"138","DOI":"10.3141\/2540-15","article-title":"Alternative Methods for the Calculation of Pedestrian Catchment Areas for Public Transit","volume":"2540","author":"Macias","year":"2016","journal-title":"Transp. Res. Rec."},{"key":"ref_15","doi-asserted-by":"crossref","unstructured":"Monteiro, J., Sousa, N., Coutinho-Rodrigues, J., and Natividade-Jesus, E. (2024). Challenges Ahead for Sustainable Cities: An Urban Form and Transport System Review. Energies, 17.","DOI":"10.3390\/en17020409"},{"key":"ref_16","doi-asserted-by":"crossref","first-page":"12632","DOI":"10.3390\/ijerph111212632","article-title":"The Association between Access to Public Transportation and Self-Reported Active Commuting","volume":"11","author":"Djurhuus","year":"2014","journal-title":"Int. J. Environ. Res. Public Health"},{"key":"ref_17","doi-asserted-by":"crossref","first-page":"840","DOI":"10.1177\/0361198118781150","article-title":"Small Steps, Big Differences: Assessing the Validity of Using Home and Work Locations to Estimate Walking Distances to Transit","volume":"2672","author":"Veillette","year":"2018","journal-title":"Transp. Res. Rec."},{"key":"ref_18","unstructured":"(2025, February 14). European Commission Physical Activity Recommendations for Adults. Available online: https:\/\/knowledge4policy.ec.europa.eu\/health-promotion-knowledge-gateway\/physical-activity-sedentary-behaviour-table-2b_en?utm_source=chatgpt.com."},{"key":"ref_19","unstructured":"(2025, February 14). Office of Disease Prevention and Health Promotion Seasonal Strategies: Empowering Your Community to Stay Active\u2014Even in the Colder Months, Available online: https:\/\/odphp.health.gov\/news\/202411\/seasonal-strategies-empowering-your-community-stay-active-even-colder-months."},{"key":"ref_20","unstructured":"(2025, February 14). World Health Organization Physical Activity. Available online: https:\/\/www.who.int\/news-room\/fact-sheets\/detail\/physical-activity."},{"key":"ref_21","doi-asserted-by":"crossref","first-page":"506","DOI":"10.1177\/0361198121999057","article-title":"Assessing Physical Activity Achievement by Using Transit","volume":"2675","author":"Morency","year":"2021","journal-title":"Transp. Res. Rec."},{"key":"ref_22","doi-asserted-by":"crossref","first-page":"213","DOI":"10.1016\/j.tra.2018.04.016","article-title":"Public Transportation Competitiveness Analysis Based on Current Passenger Loyalty","volume":"113","author":"Li","year":"2018","journal-title":"Transp. Res. Part A Policy Pract."},{"key":"ref_23","doi-asserted-by":"crossref","first-page":"984","DOI":"10.1016\/j.sbspro.2014.01.133","article-title":"Service Coverage Factors Affecting Bus Transit System Availability","volume":"111","author":"Eboli","year":"2014","journal-title":"Procedia\u2014Soc. Behav. Sci."},{"key":"ref_24","unstructured":"(1996). Texas A&M Research Foundation Guidelines for the Location and Design of Bus Stops, Transportation Research Board\u2013National Research Council. Available online: https:\/\/nacto.org\/wp-content\/uploads\/tcrp_report_19.pdf."},{"key":"ref_25","doi-asserted-by":"crossref","first-page":"93","DOI":"10.1007\/s101090300105","article-title":"Accessibility Tradeoffs in Public Transit Planning","volume":"5","author":"Murray","year":"2003","journal-title":"J. Geogr. Syst."},{"key":"ref_26","doi-asserted-by":"crossref","first-page":"265","DOI":"10.1080\/01944361003766766","article-title":"Travel and the Built Environment: A Meta-Analysis","volume":"76","author":"Ewing","year":"2010","journal-title":"J. Am. Plan. Assoc."},{"key":"ref_27","doi-asserted-by":"crossref","first-page":"103169","DOI":"10.1016\/j.trd.2022.103169","article-title":"Walking Distances to Public Transport in Smaller and Larger Norwegian Cities","volume":"103","author":"Knapskog","year":"2022","journal-title":"Transp. Res. Part D Transp. Environ."},{"key":"ref_28","doi-asserted-by":"crossref","first-page":"1087","DOI":"10.1068\/b39008","article-title":"Walking Accessibility to Public Transport: An Analysis Based on Microdata and GIS","volume":"40","author":"Cardozo","year":"2013","journal-title":"Environ. Plann B Plann Des."},{"key":"ref_29","doi-asserted-by":"crossref","first-page":"100096","DOI":"10.1016\/j.jpubtr.2024.100096","article-title":"Exploring the Role of Public Transport Service and Walking Route Related Factors to Identify Maximum Walking Distances to Bus Stops in the Netherlands","volume":"26","author":"Burger","year":"2024","journal-title":"J. Public Transp."},{"key":"ref_30","doi-asserted-by":"crossref","unstructured":"Noh, N.M., Mohamad, D., and Hamid, A.H.A. (2021, January 4\u20135). Acceptable Walking Distance Accessible to the Nearest Bus Stop Considering the Service Coverage. Proceedings of the 2021 International Congress of Advanced Technology and Engineering (ICOTEN), Online.","DOI":"10.1109\/ICOTEN52080.2021.9493435"},{"key":"ref_31","doi-asserted-by":"crossref","first-page":"88","DOI":"10.1016\/j.tranpol.2018.06.002","article-title":"Will Bus Travellers Walk Further for a More Frequent Service? An International Study Using a Stated Preference Approach","volume":"69","author":"Mulley","year":"2018","journal-title":"Transp. Policy"},{"key":"ref_32","doi-asserted-by":"crossref","first-page":"59","DOI":"10.1016\/j.retrec.2018.07.014","article-title":"Level of Service and the Transit Neighbourhood\u2014Observations from Dublin City and Suburbs","volume":"69","author":"Caulfield","year":"2018","journal-title":"Res. Transp. Econ."},{"key":"ref_33","doi-asserted-by":"crossref","first-page":"160","DOI":"10.1080\/01441647.2019.1575491","article-title":"Exploring the Distances People Walk to Access Public Transport","volume":"40","author":"Tight","year":"2020","journal-title":"Transp. Rev."},{"key":"ref_34","doi-asserted-by":"crossref","unstructured":"Yang, R., Liu, Y., Liu, Y., Liu, H., and Gan, W. (2019). Comprehensive Public Transport Service Accessibility Index\u2014A New Approach Based on Degree Centrality and Gravity Model. Sustainability, 11.","DOI":"10.3390\/su11205634"},{"key":"ref_35","unstructured":"Calthorpe, P. (1993). The Next American Metropolis: Ecology, Community, and the American Dream, Princeton Architectural Press."},{"key":"ref_36","doi-asserted-by":"crossref","first-page":"103646","DOI":"10.1016\/j.cities.2022.103646","article-title":"Accessing Public Transportation Service Coverage by Walking Accessibility to Public Transportation under Flow Buffering","volume":"125","author":"Chen","year":"2022","journal-title":"Cities"},{"key":"ref_37","doi-asserted-by":"crossref","unstructured":"Andersen, J.L.E., and Landex, A. (2008). Catchment Areas for Public Transport, WIT Press. Available online: https:\/\/www.witpress.com\/elibrary\/wit-transactions-on-the-built-environment\/101\/19399.","DOI":"10.2495\/UT080171"},{"key":"ref_38","doi-asserted-by":"crossref","first-page":"23","DOI":"10.5038\/2375-0901.13.4.2","article-title":"Using GIS for Measuring Transit Stop Accessibility Considering Actual Pedestrian Road Network","volume":"13","author":"Foda","year":"2010","journal-title":"J. Public Transp."},{"key":"ref_39","first-page":"57","article-title":"Measuring and Modelling the Spatial Accessibility of Public Transport Stops in GIS","volume":"65","author":"Kraft","year":"2016","journal-title":"Hung. Geogr. Bull."},{"key":"ref_40","first-page":"284","article-title":"A GIS Approach to Evaluate Bus Stop Acessibility","volume":"1","author":"Sabatini","year":"2005","journal-title":"Adv. OR AI Methods Transp."},{"key":"ref_41","doi-asserted-by":"crossref","unstructured":"Biraghi, C.A., Ogut, O., Dong, T., and Tadi, M. (2025). CityTime: A Novel Model to Redefine the 15-Minute City Globally Through Urban Diversity and Proximity. Urban Sci., 9.","DOI":"10.3390\/urbansci9020036"},{"key":"ref_42","doi-asserted-by":"crossref","first-page":"207","DOI":"10.1111\/j.1435-5597.1964.tb01266.x","article-title":"Computing Distances in Road Nets","volume":"12","author":"Nordbeck","year":"1964","journal-title":"Pap. Reg. Sci. Assoc."},{"key":"ref_43","first-page":"93","article-title":"External Evaluation of Road Networks","volume":"34","author":"Wiedemann","year":"2003","journal-title":"ISPRS Arch."},{"key":"ref_44","doi-asserted-by":"crossref","first-page":"103405","DOI":"10.1016\/j.jtrangeo.2022.103405","article-title":"A GIS-Based, Microscale Walkability Assessment Integrating the Local Topography","volume":"103","author":"Rahman","year":"2022","journal-title":"J. Transp. Geogr."},{"key":"ref_45","doi-asserted-by":"crossref","unstructured":"Jeong, I., Choi, M., Kwak, J., Ku, D., and Lee, S. (2023). A Comprehensive Walkability Evaluation System for Promoting Environmental Benefits. Sci. Rep., 13.","DOI":"10.1038\/s41598-023-43261-0"},{"key":"ref_46","doi-asserted-by":"crossref","first-page":"100029","DOI":"10.1016\/j.latran.2025.100029","article-title":"Influence of Slope on Pedestrian Access to Public Transportation Systems","volume":"3","author":"Coelho","year":"2025","journal-title":"Lat. Am. Transp. Stud."},{"key":"ref_47","doi-asserted-by":"crossref","first-page":"40","DOI":"10.1016\/j.trb.2015.01.006","article-title":"Optimization of Bus Stop Placement for Routes on Uneven Topography","volume":"74","author":"Ceder","year":"2015","journal-title":"Transp. Res. Part B Methodol."},{"key":"ref_48","doi-asserted-by":"crossref","first-page":"1039","DOI":"10.1152\/japplphysiol.01177.2001","article-title":"Energy Cost of Walking and Running at Extreme Uphill and Downhill Slopes","volume":"93","author":"Minetti","year":"2002","journal-title":"J. Appl. Physiol."},{"key":"ref_49","doi-asserted-by":"crossref","unstructured":"Hayauchi, G., Ariyoshi, R., Morikawa, T., and Nakamura, F. (2023). Assessment of the Improvement of Public Transport in Hillside Cities Considering the Impact of Topography on Walking Choices. Sustainability, 15.","DOI":"10.3390\/su15129571"},{"key":"ref_50","doi-asserted-by":"crossref","first-page":"93","DOI":"10.1016\/j.apgeog.2019.03.008","article-title":"Using Crowdsourced Fitness Tracker Data to Model the Relationship between Slope and Travel Rates","volume":"106","author":"Campbell","year":"2019","journal-title":"Appl. Geogr."},{"key":"ref_51","unstructured":"Tobler, W. (2023, February 14). Three Presentations on Geographical Analysis and Modeling: Non- Isotropic Geographic Modeling: Speculations on the Geometry of Geography; and Global Spatial Analysis, National Center for Geographic Information & Analysis, University of California, California. Available online: https:\/\/escholarship.org\/content\/qt05r820mz\/qt05r820mz_noSplash_8f1f13a718ba4a0db0079773ffa4a7af.pdf."},{"key":"ref_52","unstructured":"Metro Mondego (2023, January 28). Avalia\u00e7\u00e3o e Estudo da Zona Urbana de Coimbra para a Cria\u00e7\u00e3o de um Metro de Superf\u00edcie, Metro Mondego, Coimbra. (In Portuguese)."},{"key":"ref_53","doi-asserted-by":"crossref","first-page":"8","DOI":"10.1123\/ijspp.6.1.8","article-title":"Blood Lactate Diagnostics in Exercise Testing and Training","volume":"6","author":"Beneke","year":"2011","journal-title":"Int. J. Sports Physiol. Perform."},{"key":"ref_54","doi-asserted-by":"crossref","first-page":"335","DOI":"10.1016\/j.tranpol.2010.03.001","article-title":"Design Speeds and Acceleration Characteristics of Bicycle Traffic for Use in Planning, Design and Appraisal","volume":"17","author":"Parkin","year":"2010","journal-title":"Transp. Policy"},{"key":"ref_55","doi-asserted-by":"crossref","first-page":"102556","DOI":"10.1016\/j.jtrangeo.2019.102556","article-title":"Catchment If You Can: The Effect of Station Entrance and Exit Locations on Accessibility","volume":"82","author":"Lahoorpoor","year":"2020","journal-title":"J. Transp. Geogr."},{"key":"ref_56","doi-asserted-by":"crossref","first-page":"101189","DOI":"10.1016\/j.cstp.2024.101189","article-title":"Measuring Access Distance and Geographic Catchment Areas for the Bus Rapid Transit Interchange from a Longitudinal Survey","volume":"16","author":"Somenahalli","year":"2024","journal-title":"Case Stud. Transp. Policy"},{"key":"ref_57","doi-asserted-by":"crossref","first-page":"05017002","DOI":"10.1061\/(ASCE)IS.1943-555X.0000362","article-title":"Sidewalk Infrastructure Assessment Using a Multicriteria Methodology for Maintenance Planning","volume":"23","author":"Sousa","year":"2017","journal-title":"J. Infrastruct. Syst."},{"key":"ref_58","first-page":"224","article-title":"Design of Pedestrian Network Friendliness Maps","volume":"172","author":"Sousa","year":"2019","journal-title":"Proc. Inst. Civ. Eng.\u2014Munic. Eng."}],"container-title":["ISPRS International Journal of Geo-Information"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.mdpi.com\/2220-9964\/14\/5\/205\/pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,10,9]],"date-time":"2025-10-09T17:34:36Z","timestamp":1760031276000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.mdpi.com\/2220-9964\/14\/5\/205"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2025,5,17]]},"references-count":58,"journal-issue":{"issue":"5","published-online":{"date-parts":[[2025,5]]}},"alternative-id":["ijgi14050205"],"URL":"https:\/\/doi.org\/10.3390\/ijgi14050205","relation":{},"ISSN":["2220-9964"],"issn-type":[{"value":"2220-9964","type":"electronic"}],"subject":[],"published":{"date-parts":[[2025,5,17]]}}}