Abstract: The transportation integration of the adjacent regions of the Yangtze River Delta is an important cornerstone of the high-quality development of the Yangtze River Delta integration. Since the integration of the Yangtze River Delta was elevated as a national strategy in 2018, significant progress has been made in infrastructure construction, public transportation and inter-provincial road connectivity in the adjacent regions of the Yangtze River Delta. However, there are still problems in the integration of inter-provincial adjacent areas, such as unbalanced development of rail transit, poor coordination across administrative regions and insufficient social capital investment. From the perspective of high-quality development of inter-provincial adjacent areas, this paper puts forward some relevant countermeasures and suggestions, such as promoting balanced economic development, promoting cross-administrative coordination and increasing social capital investment.

Key words: Yangtze River Delta integration; transportation development; collaborative governance; social capital

摘要： 长三角省际毗邻地区的交通一体化是长三角一体化高质量发展的重要基石。自2018年长三角一体化建设上升为国家战略以来，长三角省际毗邻地区交通在基础设施建设、公共交通、省际断头路联通等方面取得显著进展，但省际毗邻地区交通一体化存在交通发展失衡、跨行政区域协同治理困难及社会资本投入不足等问题。因此，从省际毗邻地区高质量发展角度提出对策：促进经济一体化发展，发挥市场驱动作用；打破行政壁垒，推进交通一体化治理；积极推进政企合作，加大社会资本投入。

关键词: 长三角一体化；交通发展；协同治理；社会资本