Safety alert on the subway platform

Bangkok - Bangkok - Thailand

Text sign on floor between train and platform Mind the gap with white color and high angle view. gap; mind; station; train; floor; platform; warning; subway; travel; underground; danger; caution; man; sign; yellow; london; text; space; line; safety; shoes; people; person; background; symbol; step; feet; transport; traffic; alert; precaution; legs; view; waiting; accident; railway; safty; please