This from Frederik Samuel— I haven’t seen these myself (probably because I don’t do much inter-city driving), but apparently these trick billboards exist along many major roads in Turkey. The billboard itself is an ad for a national bank’s “pay your traffic tickets online” service, and then below and slightly behind the billboard is a life-sized cutout of a police car. The approaching motorist slows down because he thinks a cop is hiding behind the sign (as Turkish traffic police often do). Clever, but I’m not sure how effective an ad campaign it is for Türkiye İş Bankası. Link