Types of Train and Classes of Travel
Trains in Thailand come in a somewhat confusing variety of types: Ordinary, Rapid, Express and Special Express, with the additional feature that some are designated "Diesel Rail Cars" - combined locomotive/passenger carriage. Ordinary trains normally offer only third class seating, and seem to stop at every hamlet; the rest seem pretty much alike in journey time, and offer mainly second and third class seating and/or sleepers.