Fig. 3: The flowchart of the study.

The figure illustrates the step-by-step process of applying various methods and models in this study, encompassing input data, analytical techniques, statistical models, and their corresponding research objectives. Spatial analysis is used to evaluate the accessibility and economic potential of counties in Guizhou Province based on the road network under scenarios with and without high bridges. By comparing results under different scenarios, the contribution of high bridges to the spatial impact on accessibility and economic potential can be quantified, thus evaluating the impact of high bridges on accessibility convergence and economic integration.