## 4 Empirical Research  
This study selects Chongqing's transportation infrastructure as a case with which to empirically test the effectiveness of the AA-DNDP model proposed in the Section 2. Unlike traditional approaches that treat different types of transportation infrastructure as isolated systems, the AA-DNDP model--by integrating Agent-AI into the DNDP framework--supports coordinated planning across diverse infrastructure types in megacities. A novel scheme based on the AA-DNDP will be proposed, which is completely different from traditional transportation infrastructure planning. Given the difficulty of quantifying differences in construction and operational costs during the planning stage, this study focuses on evaluating the model's effectiveness in optimizing priority phases of infrastructure development. The specific steps are listed as follows.  
1. Present the current situation regarding transportation infrastructure in Chongqing, and draw a map of the current situation regarding transportation infrastructure.
2. Combined with the relevant planning contents of the Chongqing Municipality, the construction sequence of transportation infrastructure under traditional planning is obtained, including the planned transportation infrastructure and construction priorities, laying the foundation for subsequent research.
3. According to the results obtained in the third step, different construction priorities are proposed for the planned transportation infrastructure in the traditional transportation infrastructure planning using the AA-DNDP method.
4. Compare the influence of the efficiency of the transportation infrastructure network of the two implementation sequences on the efficiency of transportation infrastructure in Chongqing, and obtain the optimal construction sequence of the efficiency of transportation infrastructure in Chongqing.  
It is important to emphasize that the coordinated planning method through the AA-DNDP for transportation infrastructure in megacities proposed in this paper is not only intended to determine the construction priority. However, to demonstrate the effectiveness of the AA-DNDP under the same variables in megacities, the transportation infrastructure to be constructed is determined as the research object based on traditional planning. This approach ensures that Chongqing's transportation infrastructure planning proposed by the traditional planning method, or proposed by the coordinate planning method through the AA-DNDP, remains consistent in terms of construction investment, construction duration, and subsequent operation and maintenance costs. Therefore, the transportation infrastructure planning proposed by the traditional planning method in Chongqing, or proposed by the coordinate planning method in megacities based on the AA-DNDP, can be consistent in construction investment, construction period, and later operation and maintenance costs, determining more effective construction priorities for the established transportation infrastructure planning scheme through the AA-DNDP. Furthermore, the AA-DNDP can propose entirely different planning schemes compared to the traditional method. However, in this paper, to meet the requirements of control variables, a method of determining the implementation priority of transportation infrastructure will only be verified.