Dateline, Hong Kong
Paying for bread with your Octopus card, a smart card for transportation and other use.
Aggressive marketing of the latest in audio-visual technology - in the station!
Informative signage, complete with icons telling you what transportation is available at that exit (in this case, at Exit C at the Mong Kok stop in Kowloon, taxi, bus and tram are outside)
Seeing that the Chinese translation of the movie title "8 Mile" is "8 Miles of Road/Highway"
Glass screens and doors between the train and platform to prevent accidents, available in some (usually the most crowded) stations.
And, finally, using The Powerpuff Girls to promote subway safety and etiquette!