Abstract: As a new form of taxi advertising, taxi LED advertisement is deeply concerned and favored by advertisers, and its advertising effect is closely related to the delivery strategy.The traditional operational mode of taxi is mainly single shift system and double shift system.In the traditional operational mode, the LED advertising time is not flexible enough, the content is not rich enough, and the delivery area is not fine enough.In short, the current taxi LED advertising strategy is relatively extensive, and does not take into the differentiated needs of target consumer groups account.
With the popularity of ride-hailing software applications, people have experienced the convenience of the Internet to travel.The taxi industry is experimenting with a new model of "Internet travel", suggesting that taxi operations are fundamentally changing.Especially in the new operation mode, the taxi equipped with GPS positioning equipment has accumulated a large amount of running data during the driving process, which provides the necessary conditions for the detailed design and accurate delivery of the taxi LED advertising strategy.
The current theory and application of precision advertising research are analyzed, aiming at the new operation mode of taxi LED advertising is not accurate. A method to extract the temporal and spatial characteristics of resident travel behavior and the behavior characteristics of taxi drivers is constructed. According to the behavior patterns and preferences of residents and drivers, three precise strategies of taxi LED advertising are put forward.Immediate segment oriented delivery strategy, space oriented delivery strategy and time-space oriented delivery strategy.Finally, the real track data of a city taxi is used to verify and analyze it.The specific contents of the study are as follows:
(1) The feature extraction of residents' travel behavior.In this paper, the difference function algorithm is used to find the peak and off-peak travel time, and a method to extract the travel behavior time feature is proposed.Secondly, the peak density clustering algorithm is used to cluster the spatial longitude and latitude data, and the map matching and regional functional identification are carried out to get the spatial characteristics of residents' travel.
(2) The feature extraction of drivers' behavior.Firstly, the preference degree of different drivers from different drivers to different functional regions is calculated under the condition of not carrying passengers, and then the K-Means clustering algorithm is used to cluster the driver preference.Finally, based on the clustering results, the characteristics of drivers with similar behavior and those with different behaviors were observed and analyzed respectively.
(3) The formulation of precision delivery strategy.Based on the behavior rules of residents and the behavior habits of drivers, this paper puts forward three kinds of directed delivery strategies, namely, immediate segment orientation, spatial orientation and spatio-temporal orientation.Because the travel behavior of residents fluctuates in time, according to the change of residents' behavior with time, according to the change of residents' behavior with time, the timely advertisement is put out, and the appropriate advertising content is published.Set up reasonable advertising frequency and develop differentiated advertising price.The spatial orientation strategy is to place advertisements on the functional areas that residents often travel to and from.The longitude and latitude data reflecting spatial location are classified into urban functional areas by clustering, map matching and regional functional identification, and then the types of advertising information are determined in which functional areas.Spatiotemporal targeting strategy refers to placing advertisements in different functional regions at different times.Spatio-temporal directed delivery needs to mine the behavior characteristics of taxi drivers in different time and different functional areas, find the drivers with similar characteristics, and extract the functional areas of interest to achieve accurate advertising.
The design ideas and methods of the precise placement strategy of taxi LED advertisement are pect forward, improves the theoretical research system of taxi advertisement is improued, and the field of precision advertising is widened.The proposed precise delivery strategy has practical reference value for advertisers, advertising companies, taxi companies and other management departments involved in taxi advertising.

Key words: taxi advertisement, accurate delivery, taxi-hailing applications, drivers' behavior, travel behavior