Connectivity Assessment of Public Transportation Stops in Istanbul: A GIS-Integrated Approach

Esra Gizem Uğur; Zaide Duran

doi:10.26650/ijegeo.1826138

Connectivity Assessment of Public Transportation Stops in Istanbul: A GIS-Integrated Approach

Abstract

The growing population and the continuous expansion of urban areas have increased the demand for transportation systems, emphasizing the need to enhance transport infrastructure in a more efficient, integrated, and sustainable way. Integration plays a crucial role in ensuring that different modes of public transport operate harmoniously, facilitating transfers, and enabling passengers to travel easily between destinations. Numerous studies have demonstrated that such integration improves both user satisfaction and the overall use of public transport. This can be achieved through the interconnection of public transport lines and the establishment of effective transfer opportunities. This study aims to evaluate the connectivity levels of stations along Istanbul’s M7 metro line. The analysis was conducted in the QGIS environment using open-source datasets for the road network and public transport stops. A Simplified Connectivity Index (SCI) was developed by incorporating variables such as speed, passenger capacity, frequency, working hours, and distance from the origin point for all lines accessible within a defined service area of each M7 station. The findings indicate a strong relationship between SCI (connectivity) values and the number of direct transfer options, passenger volumes, and nearby non-bus stops, while a moderate relationship was observed with the number of available modes. Among the 17 analyzed stations, connectivity levels were classified as good for 5 stations, average for 4, and weak for 8, indicating uneven multimodal integration along the M7 metro line.

Keywords

References

Allen, J., & Farber, S. (2020). Planning transport for social inclusion: An accessibility-activity participation approach. Transportation Research Part D: Transport and Environment. https://doi.org/10.31235/osf.io/ap7wh.
Black, W. (2010). Sustainable transportation: problems and solutions, guildford, New York, NY.
Budd, L., & Ison, S. (2021). Public transport integration. In The Routledge Handbook of Public Transport (1st ed., pp. 72–81). Routledge. https://doi.org/10.4324/9780367816698-7
Chowdhury, S., Hadas, Y., Gonzalez, V. A., & Schot, B. (2018). Public transport users’ and policy makers’ perceptions of integrated public transport systems. Transport Policy, 61, 75–83. https://doi.org/10.1016/j.tranpol.2017.10.001
Erdaloğlu, N. (2009). Metro İstasyonlarında Yolcu Hareketlerinin İncelenmesi, İstanbul Metrosu Örneği. Istanbul Technical University.
Garcia-Martinez, A., Cascajo, R., Jara-Diaz, S. R., Chowdhury, S., & Monzon, A. (2018). Transfer penalties in multimodal public transport networks. Transportation Research Part A: Policy and Practice, 114, 52–66. https://doi.org/10.1016/j.tra.2018.01.016
Hadas, Y. (2013). Assessing public transport systems connectivity based on Google Transit Journal of Transport https://doi.org/10.1016/j.jtrangeo.2013.09.015 Geography, 33, 105–116.
Hong, J., Tamakloe, R., Lee, S., & Park, D. (2019). Exploring the topological characteristics of complex public transportation networks: Focus on variations in both single and integrated systems in the Seoul Metropolitan Area. Sustainability (Switzerland), 11(19). https://doi.org/10.3390/su11195404

İbik, T. (2024). Sürdürülebilir Kent İçi Ulaşım ve CO2 Emisyonu: İstanbul İli Örneği. Yönetim ve Ekonomi Dergisi, https://doi.org/10.18657/yonveek.1482257 31(3), 597–622.
Kasraian, D., Maat, K., Stead, D., & Van Wee, B. (2016). Long-term impacts of transport infrastructure networks on land-use change: an international review of empirical studies. Transport Reviews, 36, 772 - 792. https://doi.org/10.1080/01441647.2016.1168887.
Kuşakcı, S. Ş., Özsan, F., & Öğüt, K. S. (2013). İstanbul’da Işıklı Yaya Geçitlerinde Yaya Hızlarının İrdelenmesi. 10. Ulaştırma Kongresi, 243–252.
Metro Istanbul. (n.d.). M7 Yıldız–Mahmutbey metro line. Retrieved May 12, 2025, from https://www.metro.istanbul/Hatlarimiz/HatDetay?hat=M7
Miller, P., de Barros, A. G., Kattan, L., & Wirasinghe, S. C. (2016). Public transportation and sustainability: A review. KSCE Journal of Civil Engineering, 20(3), 1076–1083. https://doi.org/10.1007/s12205-016-0705-0
Mishra, S., Welch, T. F., & Jha, M. K. (2012). Performance indicators for public transit connectivity in multi-modal transportation networks. Transportation Research Part A: Policy and https://doi.org/10.1016/j.tra.2012.04.006 Practice, 46(7), 1066–1085.
Nielsen, O. A., Eltved, M., Anderson, M. K., & Prato, C. G. (2021). Relevance of detailed transfer attributes in large-scale multimodal route choice models for metropolitan public transport passengers. Transportation Research Part A: Policy and Practice, 147, 76–92. https://doi.org/10.1016/j.tra.2021.02.010
Öztürk, B. (2021). İstanbul metro aktarma merkezlerinin entegrasyon ve erişilebilirlik unsurlarının araştırma ve değerlendirmesi. Istanbul Technical University.
Park, J., & Kang, S. C. (2011). A Model for Evaluating the Connectivity of Multi Modal Transit Networks. Transportation Research Board 90th Annual Meeting.
Psaltoglou, A., & Calle, E. (2018). Enhanced connectivity index – A new measure for identifying critical points in urban public transportation networks. International Journal of Critical Infrastructure https://doi.org/10.1016/j.ijcip.2018.02.003 Protection, 21, 22–32. Sarker, A. A., Mishra, S., & Welch, T. F. (2015). A Model Framework for Analyzing Public Transit Connectivity and Its Application in a Large-scale Multi-modal Transit Network. https://www.researchgate.net/publication/313974830
Schakenbos, R., Paix, L. La, Nijenstein, S., & Geurs, K. T. (2016). Valuation of a transfer in a multimodal public transport trip. Transport Policy, 46, 72–81. https://doi.org/10.1016/j.tranpol.2015.11.008
Schiller, P. L., Bruun, E. C., and Kenworthy, J. R. (2010). An Introduction to Sustainable Transportation: Policy, planning, and implementation, Earthscan, Washington DC.
Sipetas, C., Huang, Z., & Espinosa Mireles de Villafranca, A. (2024). Evaluation Framework for Multi-Modal Public Transport Systems Based on Connectivity and Transfers at Stop Level. Transportation https://doi.org/10.1177/03611981241231963 Research Record.
Uğur, E. G. (2025, June). Assessing connectivity levels of public transportation stops: A case study of Istanbul [Master’s thesis, Istanbul Technical University]. Council of Higher Education Thesis Center. https://tez.yok.gov.tr/UlusalTezMerkezi/
Vreeker, R. and Nijkamp, P. (2005). Multicriteria evaluation of transport policies, In K. J. Button & D. A. Hensher (Eds.), Handbook of Transport Strategy, Policy and Institutions, pp. 507-526, Elsevier Oxford, UK.
Yin, B., & Leurent, F. (2022). Estimation of Transfer Time from Multimodal Transit Services in the Paris Region. Future Transportation, 2(4), 886–901. https://doi.org/10.3390/futuretransp2040049
Yoo, G. S. (2015). Transfer penalty estimation with transit trips from smartcard data in Seoul, Korea. KSCE Journal of Civil Engineering, 19(4), 1108–1116. https://doi.org/10.1007/s12205-013-1297-6
Zimmerman, S., & Fang, K. (2015). Public Transport Service Optimization and System Integration.

Details

Primary Language

English

Subjects

Geomatic Engineering (Other)

Journal Section

Research Article

Authors

Esra Gizem Uğur ^*
0009-0000-3252-9230
Türkiye

Zaide Duran
0000-0002-1608-0119
Türkiye

Publication Date

January 12, 2026

Submission Date

November 18, 2025

Acceptance Date

December 14, 2025

Published in Issue

Year 2025 Volume: 12 Number: 4

DOI

https://doi.org/10.26650/ijegeo.1826138

IZ

https://izlik.org/JA36BM47UG

Cite

RIS / Bibtex

APA

Uğur, E. G., & Duran, Z. (2026). Connectivity Assessment of Public Transportation Stops in Istanbul: A GIS-Integrated Approach. International Journal of Environment and Geoinformatics, 12(4), 415-424. https://doi.org/10.26650/ijegeo.1826138

AMA

1.Uğur EG, Duran Z. Connectivity Assessment of Public Transportation Stops in Istanbul: A GIS-Integrated Approach. IJEGEO. 2026;12(4):415-424. doi:10.26650/ijegeo.1826138

Chicago

Uğur, Esra Gizem, and Zaide Duran. 2026. “Connectivity Assessment of Public Transportation Stops in Istanbul: A GIS-Integrated Approach”. International Journal of Environment and Geoinformatics 12 (4): 415-24. https://doi.org/10.26650/ijegeo.1826138.

EndNote

Uğur EG, Duran Z (January 1, 2026) Connectivity Assessment of Public Transportation Stops in Istanbul: A GIS-Integrated Approach. International Journal of Environment and Geoinformatics 12 4 415–424.

IEEE

[1]E. G. Uğur and Z. Duran, “Connectivity Assessment of Public Transportation Stops in Istanbul: A GIS-Integrated Approach”, IJEGEO, vol. 12, no. 4, pp. 415–424, Jan. 2026, doi: 10.26650/ijegeo.1826138.

ISNAD

Uğur, Esra Gizem - Duran, Zaide. “Connectivity Assessment of Public Transportation Stops in Istanbul: A GIS-Integrated Approach”. International Journal of Environment and Geoinformatics 12/4 (January 1, 2026): 415-424. https://doi.org/10.26650/ijegeo.1826138.

JAMA

1.Uğur EG, Duran Z. Connectivity Assessment of Public Transportation Stops in Istanbul: A GIS-Integrated Approach. IJEGEO. 2026;12:415–424.

MLA

Uğur, Esra Gizem, and Zaide Duran. “Connectivity Assessment of Public Transportation Stops in Istanbul: A GIS-Integrated Approach”. International Journal of Environment and Geoinformatics, vol. 12, no. 4, Jan. 2026, pp. 415-24, doi:10.26650/ijegeo.1826138.

Vancouver

1.Esra Gizem Uğur, Zaide Duran. Connectivity Assessment of Public Transportation Stops in Istanbul: A GIS-Integrated Approach. IJEGEO. 2026 Jan. 1;12(4):415-24. doi:10.26650/ijegeo.1826138