Bangkok - Bangkok - Thailand

Mind the gap text sign on floor between train and platform station and high angle view. gap; mind; train; sign; platform; warning; station; danger; safety; yellow; london; underground; floor; transport; edge; text; caution; symbol; urban; feet; concept; subway; people; line; background; travel; space; traffic; alert; uk; shoes; england; railway; precaution; step; person; man; view; tube; transportation; united; secure