Bangkok BTS will be free for cyclists

Bangkok BTS or Skytrain will be free for cyclists and their
transport on 21-22 September this year. The action is timed to celebration of
Car Free Day which is held in Bangkok
every year with a view to raise awareness of energy conservation and to
motivate people to use public transport more often.

Undoubtedly bicycle & BTS is the best option of movement
around the city this days, but passengers have to be sensible about which stops
they use and what time of the day they move. Probably cyclists have to try to
avoid the busiest stations.

Source