This study examined the communication style of Korean society using car stickers, particularly novice driver signs, drawing from Habermas’ theory of communicative action. The communication styles that could be observed on novice driver signs were classified into eight categories, and changes in these styles were analyzed. A novice driver sign can be perceived as a communicative device, moral protective device, or safety device by means of which the novice driver talks to the experienced driver. Such a sign is a medium of communication among the cars in question. An ideal communication can be realized if the receiver who is an experienced driver is able to accept the intention of the speaker, namely, the driver who attaches the sign on his or her car. In fact, however, the character of an individual or a disadvantaged group is more likely to be damaged within a society. The personality of both the novice driver who attached the sign and the experienced driver who accepts it should be respected on the road. This will occur when both instrumental rationality and communicative rationality are realized by the novice driver sign, as suggested by Habermas.