基于GIS的青岛市中心城区道路网络可达性研究

针对青岛市中心城区交通网络建设不完善的问题,研究了该区域路网的综合可达性,并提出了相应的解决方案。基于GIS平台,建立了青岛市中心城区路网模型;选取最小阻抗(时间和距离)、交叉口服务指数、路网密度和路网连通度作为关键评价指标,分别从路网距离关系、路网结构合理性、路网密度和路网发育程度4个方面分析了该区域的路网可达性;在此基础上,建立了青岛市中心城区路网综合评价模型。研究结果表明,该区域的路网以多中心多圈层形式分布,整体可达性良好;西南区域路网密度低,南部外围区域机动性差,南部地区可达性较差,应不断加强该地区的基础设施与路网建设。

Research on the Road Network Accessibility in Qingdao Central Urban Area Based on GIS

Aiming at the imperfect traffic network construction of Qingdao central urban area,we studied the comprehensive accessibility of the road network,and proposed the corresponding solutions.Firstly,we established a road network model of Qingdao central urban area based on GIS platform.Then,we selected four key indicators,such as the minimum impedance(time and distance),intersection service index,road network density and road network connectivity,to research the accessibility form the aspects of road network distance relationship,road network structure rationality,road network density and road network development degree,respectively.According to the above results,we established a comprehensive evaluation model to study the accessibility of the overall road network in this region.The results show that the road network overall accessibility is good with a spatial pattern of multi-center multi-circle distribution in research region.The accessibility of southern is poor with the reason that the southwestern regional road network has low density and the southern peripheral area has poor mobility.The infrastructure and road network construction of southern should be strengthened continuously.