Bangkok MRT

Bangkok MRT is the other half of the rail story. BTS is the hotel-and-mall spine. MRT is what you remember for Chinatown, Chatuchak, Silom/Sukhumvit transfers, and the parts of Bangkok where the Skytrain does not help.

The Blue Line is the visitor line. It gets you to Wat Mangkon for Yaowarat/Chinatown, Kamphaeng Phet for Chatuchak Weekend Market, Sukhumvit for the Asoke transfer, and Silom for the Sala Daeng/BTS side.

Payment

The current visitor-friendly piece is EMV on the Blue and Purple lines: tap in and tap out with the same supported contactless bank card or wallet. That is much cleaner than the older stored-value-card puzzle.

Bangkok still has fragmentation, though. BTS uses Rabbit/single-journey/one-day pass logic. Airport Rail Link has its own ticketing. The newer MRT monorail lines can have their own quirks. For a first trip, know Blue Line, know BTS, and use Grab when the route turns into a transfer game.

How I use it

I use MRT for Chinatown and Chatuchak before I use it for anything abstract. Wat Mangkon makes Yaowarat much easier. Kamphaeng Phet drops you directly into the market instead of making you guess which road crossing is least miserable.

Bangkok is too hot and too traffic-heavy to be proud about one mode. Use BTS when your hotel is on it, MRT when the destination is on it, river boats for the old-city temples, and Grab for everything that would otherwise become a sweaty puzzle.