476,945 people — 38.4% of mainland Brisbane — live beyond a 400 m walk of any public transport stop with a scheduled service. Measured mesh block by mesh block from the TransLink SEQ GTFS feed and the 2021 Census, routed over the pedestrian street network rather than in a straight line. Queensland's own Priority Development Area guidelines set a target of 90% of residences within 400 m of a stop; on a walking basis Brisbane reaches 64.9% of dwellings, so roughly 130,129 more homes would have to come inside the threshold to meet the state's standard.
About this map. Suburb boundaries are simplified to a 25 m tolerance so the page loads on a phone — the full-resolution outlines are 340 KB here against 7.8 MB unsimplified, and the change to any suburb's area is under 0.01%. Shading is the share of each suburb's residents within a 400 m walk of a serviced stop; a red outline means no resident is. The underlying analysis is per mesh block, not per suburb — suburb shading is a summary of it, and the block-level layer is held back for the full map build.
The straight-line floor for the same test is 109,732 residents (8.8%); both bases are published everywhere. Every measurement convention in the pipeline was varied at once — 81 permutations of block origin, snapping tolerance, fallback rule and the walk threshold. Holding the 400 m threshold at the state's own standard, the figure lands between 468,290 and 495,185 (37.7%–39.9%). We publish 476,945. Let the threshold move ±5% and the band widens to 34.4%–43.0%.