中文摘要：

通过公路网络密度、综合交通可达性以及关键节点联系便捷性三要素的综合集成，探讨了长江三角洲地区交通优势度的空间格局。长三角地区公路路网密度居于全国前列，北部地区明显高于南部；综合交通可达性较好的单元相对集中于沪宁-沪杭-杭甬沿线地区，由此区域向南、向北可达性逐渐降低；各地域单元与关键节点的联系均较为便捷，上海及其临近地区便捷性最高，由此向外围呈现明显的“中心-外围”格局。长三角地区交通优势度优于区域平均水平的地域单元占据优势；空间上南北分异明显，北部地区总体优于南部，上海及其毗邻地区优势度最高，沪宁沿线、沿江地区以及沪杭沿线较好，而南北部边缘地区相对较差。最后从区域发展角度提出了不同地域单元发挥交通优势和规避交通劣势的对策建议。

英文摘要：

Based on the scale and the reality of the Yangtze River Delta, taking the county as the basic research unit, this article analyzes the pattern of transportation superiority in the Yangtze River Delta in the aspects of the highway network density, the integrated transportation accessibility and the convenience of linking with the regional key cities. Some conclusions are drawn as follows. （1） The Yangtze River Delta has one of the highest highway density in China, and the highway density of the northern part is significantly higher than that of the southern part. The units with highly integrated transportation accessibility are relatively concentrated in the areas along the transportation corridors of Shanghai-Nanjing, Shanghai-Hangzhou, and Hangzhou-Ningbo and the accessibility decreases gradually from the north to the south. Following a distinct core-periphery pattern, the links with the regional key cities are very convenient. The most convenient areas are Shanghai and its adjacent units. （2） The transportation superiority of 50% of the units are close to the regional average level, with more than half of the units having transportation superiority higher than the regional average level. On the whole, the northern part of the region has higher transportation superiority than the southern with a great difference. Shanghai has the highest transportation superiority, which is also high in the units around Shanghai. Other units with better transportation superiority are centralized in the areas along the transportation corridor of Shanghai-Nanjing, Shanghai-Hangzhou, and the Yangtze River. The transportation superiority of the units on both northern and southern edges of the Yangtze River Delta is relatively low. Based on these results, this article puts forward several proposals for the regional development in taking the advantages and avoiding the disadvantages of each specific transportation situation.