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Who Reaches the Hubs?
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Every day, thousands of people travel from suburban neighbourhoods to Lisbon, each depending on a transit hub to start their journey. Yet, which hubs they turn to and how easily they can reach them remain open questions. RQ1 – How does network structure relate to accessibility? To what extent do Node2Vec embeddings and graph centrality metrics explain suburban passengers' ability to reach transit hubs within 15 minutes? RQ2 – Where do structural importance and accessibility diverge? Which hubs are highly central in the metropolitan bus network yet offer poor short-travel-time access, indicating potential first-mile bottlenecks? RQ3 – Can graph-based representations reveal functional hub types? Do embeddings and clustering uncover distinct categories of hubs with characteristic accessibility and network roles?
Descrição
Filonchik, K. (2025). Who Reaches the Hubs? A Graph-Based Analysis of Suburban Access to Lisbon’s Transit Network [poster]. Poster session presented at Data Research Meetup by MagIC, Lisboa, Portugal. --- This work was supported by national funds through FCT (Fundação para a Ciência e a Tecnologia), under the project - UID/04152/2025 - Centro de Investigação em Gestão de Informação (MagIC)/NOVA IMS - https://doi.org/10.54499/UID/04152/2025 (2025-01- 01/2028-12-31) and UID/PRR/04152/2025 https://doi.org/10.54499/UID/PRR/04152/2025 (2025-01-01/ 2026-06-30) and Project Enhance - F-DUT-2022-0393.