城市破碎用地的交通组织研究

A Research on Traffic Organization of the Fragmentary Urban Lands

区域道路穿越城市的负外部性显著,传统的"修复型"应对方案存在道路建设总量和城市交通成本大幅增加的弊端。本文基于交通流分解和城市功能组团化布局提出了"分流型"交通方案,并通过模型计算证明"分流型"交通方案具有明显的成本优势。最终得出如下结论:(1)分流型交通方案可以实现控制交通总成本和提高交通运行效率的双重效益;(2)城市功能的组团化布局是分流型方案得以实施的关键;(3)区域道路在规划建设时应充分考虑地方城镇的发展诉求。在应对交通基础设施快速发展导致的城市用地破碎问题方面,本研究具有一定的借鉴意义。

Regional roads always bring negative externality when they go through cities and towns while traditional planning have problems in transportation cost. This paper proposed a plan based on the idea of disintegrating traffic flows and rearranging urban functions in groups. Through analysis of corresponding models, we can find this plan has evident advantages in controlling transportation cost. The conclusions are： （1） disintegrating traffic plan can both control transportation cost and improve traffic efficiency; （2） arranging urban functions in groups is the key point in the decentralizing traffic plan; （3） we should take local demands into consideration when planning regional roads. This study can help solve the problem of urban land fragmentation caused by the rapid development of regional roads and infrastructures.