交通基础设施与经济高质量发展之间存在相互促进、相互影响的作用。文章以成渝地区双城经济圈为研究对象, 从理论层面提出交通基础设施建设与经济高质量发展双向互动的机理, 测算各个城市的交通基础设施指数与经济高质量发展指数, 并采用耦合度模型、耦合协调度模型分析二者的耦合协调发展状况。结果表明: (1) 成渝地区双城经济圈内城市交通基础设施指数值上升趋势明显, 而经济高质量发展指数值则略有下降; (2) 研究期内绝大部分城市的耦合度与耦合协调度均呈平稳增长趋势; (3) 成渝地区双城经济圈内城市之间差异较为明显, 整体上重庆优于四川。上述结果反映出当前成渝地区在协同推进交通与经济发展中仍面临结构性短板与区域不平衡问题。为此, 提出不断完善交通基础设施、深化经济发展动力变革、推动产业结构转型升级、促进经济社会绿色转型等相关政策建议。

There is a mutually reinforcing and interacting relationship between transportation infrastructure and high-quality economic development. Taking the Chengdu-Chongqing Twin-City Economic Circle as the research subject, this paper proposes the mechanism of two-way interaction between transportation infrastructure construction and high-quality economic development from a theoretical perspective, calculates the transportation infrastructure index and high-quality economic development index of each city, and employs coupling degree and coupling coordination degree models to analyze their coupled and coordinated development. The results show that: (1) The urban transportation infrastructure index in the Chengdu-Chongqing Twin-City Economic Circle has shown an obvious upward trend, while the high-quality economic development index has slightly declined; (2) During the research period, the coupling degree and coupling coordination degree of most cities demonstrate a steady growth trend; (3) There are significant differences among cities in the circle, with Chongqing generally outperforming Sichuan. The above results reflect that the Chengdu-Chongqing region still faces structural shortcomings and regional imbalances in the coordinated promotion of transportation and economic development. To this end, relevant policy recommendations are put forward, such as continuously improving transportation infrastructure, deepening the transformation of economic development drivers, promoting the transformation and upgrading of industrial structure, and advancing the green transformation of economy and society.