渤海海峡跨海通道对区域交通可达性的影响

The Influence of Trans-Bohai Strait Passageway on Regional Traffic Accessibilities in China

利用日常可达性、加权平均时间,基于TransCAD比较有无渤海海峡跨海通道两种情况下区域可达性空间格局的变化。结果显示,跨海通道将扩展出行时空范围,区域整体可达性大幅优化,形成均衡的可达空间格局。跨海通道的主要辐射范围为东北物流区域、山东半岛物流区域、长江三角洲物流区域和珠江三角洲物流区域。跨海通道建设后通道两端的区域间时间成本显著降低,区域交通可达性由中心—外围的圈层式格局演变为以大连—烟台为中心的条带式空间格局,相应变化遵循空间递减规律,跨海通道对区域可达性提升幅度依次为东北物流区域、长江三角洲物流区域和珠江三角洲物流区域。

The construction of Trans-Bohai strait passageway largely improves inter-urban accessibility in China. The valuation of accessibility was conducted with two indicators, i.e. daily accessibility and weighted average time. After the valuation, differences between accessibility patterns scenarios with and without trans- Bohai strait passageway were analyzed based on Trans CAD. The results indicated that Trans- Bohai strait passageway would expand the travel timespace range, and realize significant optimization of urban daily accessibility and form uneven space accessibility. The main radiation range of trans- Bohai strait passageway is logistics regions of northeast China, Shandong Peninsula Logistics Region, Yangtze River delta logistics region and Pearl River Delta logistics region of China. Both ends of the passageway node city time- cost significantly reduce, and accessibility area range increase significantly, the regional network accessibility turns an core-periphery ring structure into band structure within Yantai-Dalian city,the accessibility decreases from center to peripheries. The influence of trans-Bohai strait passageway on regional accessibility shows that Northeast Regional Logistics, Yangtze River Delta and Pearl River Delta logistics area get high accessibility variability.