A brief 2007 post on this website announced plans for Bangkok’s future Purple Line railway, predicting a construction process that would begin the following year. The same old post also commented on political events in Myanmar. Those were two separate stories from the same moment in history. Today’s useful travel question is simpler: where does the MRT Purple Line operate, how does it connect with other rail services and which projects remain under development?
Where the Purple Line runs
Bangkok’s MRT Purple Line, formally known as the Chalong Ratchadham Line, links the Bangkok metropolitan area with Nonthaburi to the northwest. The current operational northern section runs between Khlong Bang Phai and Tao Poon, with stations serving residential areas, local commercial districts and onward connections.
The railway operator BEM describes the route as an elevated line with 16 stations. It opened in August 2016, several years after the original 2007 prediction. A ten-year-old construction report should therefore not be used as evidence of today’s service pattern, ticket price or travel time.
How to connect to the MRT Blue Line
Tao Poon is the major interchange between the Purple and Blue lines. The Blue Line provides access to a much wider urban railway network and onward journeys towards numerous parts of Bangkok. For a visitor starting at a hotel near a Blue Line station, changing trains at Tao Poon may be the easiest way to reach destinations on the Purple Line.
Check the current route map and station signs before setting off. Some transport applications display several Bangkok rail operators in one diagram even though ticketing rules and payment options may not be identical across every service. The colour on a map identifies a line; it does not necessarily mean every train and station uses the same payment product.
Useful reasons to take the Purple Line
The Purple Line is not primarily an airport railway or a route for crossing the historic centre of Bangkok. It is particularly valuable for people living, working or visiting places in Nonthaburi and the adjoining metropolitan area. Depending on your destination, it may replace a long road journey or make a station-to-station trip more predictable.
For sightseeing, take time to see what is within a reasonable walk of the station instead of assuming that the line itself directly serves every attraction in Nonthaburi. A station may be near a main road, canal or neighbourhood with pedestrian crossings that are less convenient than the map suggests.
If you are meeting someone, agree on the exact exit or landmark. Different sides of an elevated station can open onto opposite carriageways, making a short-looking walk unexpectedly inconvenient. This matters in Bangkok heat or when travelling with luggage.
Accessibility and comfort
Before travelling, consult the operator’s latest station information for lifts, escalators, accessible routes and any temporary closures. An elevated railway may offer lifts, but a street-level entrance can still involve a long crossing or detour. Travellers using wheelchairs, pushchairs or large suitcases benefit from checking the precise station entrance.
Remember that Bangkok’s rainy season can turn a short walk between a station and a destination into an uncomfortable transfer. Keep a light rain jacket or umbrella and allow extra time for surface-level connections. Consider travelling outside the busiest commuting periods when carrying substantial baggage.
Is the Purple Line being extended?
The southern extension from Tao Poon towards Rat Burana is a distinct construction project, not a section that every traveller can already ride. The Mass Rapid Transit Authority of Thailand published a construction update in January 2025, while a later MRTA project listing described an updated implementation plan in 2026. Forecast completion dates can change as works progress.
Do not book a journey based on an illustration of a future route. Compare the current operating network with the official project information, and verify that the destination station has actually opened to passengers.
How to plan your trip
- Identify the nearest station to both your start and final destination rather than selecting a route only by line colour.
- Check official operating hours and service notices on the day of travel.
- Look up fare information using an operator’s current information, rather than a historical news report or travel blog.
- Allow time for interchanges, station exits and any taxi or bus connection needed after leaving the railway.
- If an extension is under construction, plan around the operational part only.
What changed since the original 2007 report?
In 2007, the Purple Line was a funding and construction story. By August 2016, the northern railway had become part of everyday journeys around Bangkok and Nonthaburi. Further expansion is another chapter, subject to the schedules published by the responsible authorities. The important distinction is between a historic promise, an operating railway and a future project.
For anyone exploring the city, the Purple Line is best understood as one useful connection within a larger transport network, not a shortcut to every destination. Confirm fares, access and construction notices before travel.
