Traffic Status Evaluation Based On Baidu Map Open Data

With the acceleration of urbanization,the basic traffic data has developed from relatively independent small-scale static traffic data to closely related large-scale dynamic traffic data,and many map application programming interfaces(APIs).Such as the application programming interface of Baidu Maps Open Data.This research uses Baidu Maps open data to make up for the lack of basic traffic data sources in the all-day monitoring and management of urban traffic.The constructed traffic state road network evaluation model can express the change of urban traffic operation state.Both can complete the analysis of the evaluation of the urban traffic state,and further grasp the state of the urban traffic system.The main research contents and conclusions are as follows:(1)This paper studies the acquisition method,data quality and data morphological structure of real-time traffic monitoring data in Baidu Maps Open Data Web Service API document.Analyzes the spatiotemporal characteristics of traffic data,and completes allweather traffic monitoring on roads.(2)Based on the representation method of road network topology and traffic impedance,the evaluation index is obtained by simulating the urban traffic operation state.Combined with the evaluation index system,the traffic state coefficient and weight and the traffic state road network evaluation model is constructed.And the traffic status of the road network under the change of the weight adjustment coefficient is analyzed.The results show that the change of the weight adjustment coefficient does not change the final evaluation grade.In addition,the hierarchical changes of the road network in the model express the traffic operation status of urban roads.(3)In order to make up for the lack of open data structure of Baidu Maps,Baidu Maps API is used to continuously monitor urban traffic conditions throughout the day.Combined with the field investigation to obtain the basic data of urban traffic conditions,the evaluation and analysis of the urban traffic state is completed by using the traffic state road network evaluation model.The results show that both the Baidu map road condition data and the traffic state road network evaluation model can complete the evaluation and analysis of the urban road traffic state.The above research can not only improve the refined management of urban traffic conditions,but also provide travelers with valuable travel service reference information and improve the operational efficiency of urban traffic systems.This has a very important guiding role in the intelligent management and control of the operation of the urban transportation system,the rational allocation of basic transportation resources,and the improvement of the quality of transportation information services.