中文摘要：

交通基础设施建设与区域经济发展关系研究是交通地理学关注的焦点,但现有研究对于两者的内在关系仍存较多争议。鉴于此,将可达性不同概念纳入空间计量模型,构建包含可达性与经济变化的二阶空间滞后模型,试图从空间计量视角探讨可达性变动与区域经济发展的联系。研究显示：交通建设扩大了长江南北可达性的绝对差距,增强了长三角江苏部分城镇间的凝聚力,使苏中地区顺利融入长三角;在江苏＂十一五＂期间,交通建设并没有促进经济发达城镇带动周边城镇发展,但是交通建设改善了城镇发展环境,对经济持续发展有积极的作用;在加强交通基础设施建设中,应注意交通建设对经济发展的结构性效益。

英文摘要：

The relationship between transportation infrastructure construction and regional economic development is the focus of transportation geography. But the current researches about the inner relationship of them are still controversial. Consequently, in order to discuss the influence of accessibility change on towns＇ economic development from spatial econometric perspective, this paper introduces different concepts of accessibility and embeds them into spatial econometric model and then, creates two-order spatial lag regression model containing the changes of accessibility and economic development. The results show： The transportation construction enlarges the absolute gap between areas north and south of the Yangtze River,reinforces the cohesion of some towns attached to Jiangsu province in the Yangtze River Delta,so that the central part of Jiangsu are smoothly integrated into the Yangtze River Delta.However, during the ＂11th Five- Year Plan＂ Period, in Jiangsu province, the areas close to developed cities have less economic development under the background of transportation constructions. Instead, they improve the urban development environment. The transportation constructions have a positive effect on sustainable economic development. It is crucial to focus on the structural benefits of transportation construction to economic development in the upgrade of transportation infrastructure.