The second is street sign advertising. Compared with poster advertisements, street sign advertisements are more formal. Every billboard can be drawn according to the requirements of advertisers and with the consent of relevant advertising management departments, which is very eye-catching and beautiful. There used to be an electric three-sided billboard on Maoming Road, Yan 'an Middle Road, Shanghai, which integrated mechanical rotation, decorative relief, automatic timekeeping and other functions, and played a very good role in beautifying the city. This mobile billboard, more than eleven meters wide and five meters high, is composed of eighteen rotating gossip, which automatically changes a picture every twenty seconds, which is very eye-catching.
The third is neon advertising. Neon advertisements installed in busy downtown areas not only promote products, but also decorate the city.
In addition, the forms of outdoor advertising include advertising gallery, commodity model and so on. At present, some advanced outdoor advertisements abroad also use sound, light, color, taste and other technologies to make advertisements more attractive. A food company in the United States erected a giant advertising model to promote bread in the suburbs of Detroit. The model was 80 feet high and 100 foot long. When pedestrians approach it, they can not only hear the sound of light music and bread introduction, but also smell the fragrance of "magic mixed bread", which immediately arouses people's appetite.