The widespread application of "Internet +" technology has enlightened the problemsolving of the increasingly heavy traffic in China. Thus the "Internet + traffic" has been pushed to the leading edge. The numerous researches in the "Internet + traffic" field mainly focus on the strategies of transformation and upgrading the existing traffic system to a more "internet" way, few have ever concerned about the demands on developing "Internet + traffic" of each cities, which was usually treated as for granted. However, as this paper finds out, different cities, based on their urban traffic development, have different levels of "Internet + traffic" development demand. Therefore, in this paper we discuss the development index and construction demand degree of the "Internet + traffic". In addition, we build the multiple regression model and select data of 36 principal cities in China to make clear the construction level and key development areas of "Internet + traffic" under the requirements of urban traffic. Additionally, the prediction model is provided to evaluate the construction degree of separate cities when developing "Internet + traffic". At last, suggestions would be put forward for a better development of the "Internet + traffic".