Transport accessibility metrics per subdistrict. Includes station proximity, bus routes, road length, and accessibility score (0-100). Refresh with: REFRESH MATERIALIZED VIEW CONCURRENTLY sgkv.mv_transport_accessibility;
accessibility_score bus_route_count district_code district_name nearest_station_m nearest_station_name nearest_station_type road_length_km station_count subdistrict_code subdistrict_id subdistrict_name