Independent desk assessment from public data (LTA announcements, LTA DataMall, OpenStreetMap). Route paths are reconstructed from LTA's published maps and stop lists, not surveyed. Segments are coloured by the sum of their risk-register scores. Source and method: repository.
Punggol routes: LTA news releases of Sep 2025, Mar 2026 and Jul 2026. Services 400 and 191 were named for LTA's autonomous bus pilot, which LTA said in Oct 2026 will not proceed on those services; they are shown for comparison. Map data (c) OpenStreetMap contributors.