基于城市多中心的地铁影响区域确定

Determination of Subway Influence Areas Based on Multi-center City

城市地铁与多种公共交通方式协同一体化发展,对地铁客流影响范围确定方法及精确性提出了更高的要求。为研究多城市中心作用下地铁影响区域,采用广义费用表征可达性,建立了地铁影响区域模型,结合修正Huff模型求解不同城市中心吸引概率,进而确定多城市中心综合影响范围。以石家庄地铁2号线为例,确定其影响区域半径处于248~1348m之间。研究表明,单一城市中心与多城市中心作用下,地铁影响区域均呈现距城市中心越远影响范围越大的变化趋势,研究成果可为城市交通一体化、用地性质规划等提供理论支持。

The coordinated and integrated development of urban subways and a variety of public transport puts forward higher requirements on the method and accuracy of determining the influence range of subway passenger flow.To study the areas affected by subways under the effect of multi-center cities,this paper used a generalized cost to characterize the accessibility,built a subway influence area model,and solved the attraction probability of multi-center cities through the modified Huff model,determining the comprehensive influence range of multi-center cities.Taking Shijiazhuang Subway Line 2 as an example,it is determined that the radius of its influence area was between 248 and 1348 m.Under the influence of the single-center city and multi-center city,the areas affected by subways tend to become larger if they are far away from city centers.The research results can provide theoretical support for urban transportation integration and land use planning.