Xu, Chan, Chen & Liu – WALK THIS WAY 2022

Description

This article distinguishes accessibility (ease of reaching destinations) from mobility (ease of traveling through a network) and uses Hong Kong’s newly released 3D pedestrian network to visualize both around metro stations. The authors compute 500‑meter walking coverage as a proxy for accessibility and a 10‑minute reachable area (walking speeds adjusted by Tobler’s hiking function; lift/escalator/travelator speeds set per local guidance) to represent mobility. Comparisons for 90 stations reveal significant discrepancies between coverage and reachable areas; stations were ranked by similarity using Euclidean distance of farthest points. Three illustrative pairs show causes: Hung Hom vs Sham Shui Po—large complexes at Hung Hom limit directional mobility while Sham Shui Po’s grid yields even access; Central vs Admiralty—Central’s multi‑layer pedestrian network enhances northward mobility; Tseung Kwan O and SHT—transit‑oriented new towns exhibit coherent accessibility and mobility. The visualizations provide initial evidence of accessibility–mobility gaps to inform planning strategies. (Analyses implemented in Python.)