By means of data visualization, this work shows the traffic congestion in Lanzhou in real time. Main functions: 1. Administrative region display: through interactive maps, real-time display of the administrative region boundaries of districts and counties in Lanzhou. 2. Business district congestion: show the real-time traffic flow and congestion level in the main business district in the form of heat map. 3. Traffic congestion index: Calculate and dynamically display the congestion index of main roads based on real-time vehicle flow. 4. Sliding timeline: supports viewing the traffic situation at any time in history by sliding the timeline. 5. Road conditions query: support the input of specific road sections to query their real-time traffic conditions. 6. Data sources: Integrate traffic flow data from traffic management departments and third-party data sources. 7. Visual display: Visually display traffic changes through dynamic heat maps and congestion index indicators. Through real-time dynamic data visualization, the system helps drivers and management departments to understand the real-time traffic situation of any area and section of Lanzhou City, better plan travel routes and alleviate traffic congestion. At the same time, it also provides reference for urban traffic planning and optimization. The system uses cutting-edge data display means to realize the intuitive communication of traffic information.