Route decision
Bus route
Bangkok to Chiang Mai by Bus.
Officially important long-distance route, but the travel decision depends on PM2.5, duration tolerance, and whether train or flight is cleaner.
Route planning reference
Bus Route route check
This static bus route page is paired with the current route check. Use it to separate a route that exists from a route that still works after weather, transfer burden, ferry fragility, and weak-leg risk are considered.
This is general route guidance; a verified current route check will appear only when a fresh snapshot is available.
- Namtang GTFS
- BKS timetable resources
- MOT/BKS facility data
Timetable cache every 1-6 hours if permitted; GTFS daily.
Use GTFS, MOT/BKS, and OSM for static structure. Do not imply realtime availability unless a documented public or partner API exists.
- Station correctness
- Timetable freshness
- Road/weather risk
- Whether flight/train/ferry is a better path
Bus route data workflow
The route page should become more confident as each layer agrees.
| Step | Data layer | Decision role |
|---|---|---|
| 1 | MOT/BKS station master | Confirms origin/destination facility identity |
| 2 | Namtang GTFS or route feed | Confirms route/stop/trip structure where covered |
| 3 | BKS timetable / official operator page | Adds departure and direction context |
| 4 | OSM / Transitland validation | Cross-checks stop geometry and feed history |
| 5 | Partner booking/realtime API | Only then add seat availability, live ETA, or price |
Sources and verification
Route-planning and condition sources
A route shape is static planning context. Weather, road conditions, operator status, and booked-service terms must be confirmed from the relevant live authority or operator.
- Thai Meteorological Department — daily forecast and warnings
- Thaiwater — rainfall, flood, and hydrology context
- Department of Land Transport — public transport information
Source list researched: 24 August 2026. Do not treat this page as a current road, ferry, rail, or weather clearance. Report a factual correction.