This paper extends the discussion about the bus network design in face of the mobility patterns associated with different degrees of urban dispersion. Based on an analytical approach, a comparison of total costs among different network structures is made for a ring-radial city, which is the other most common regular city layout. The results clarify what structure is the best solution for different scenarios of dispersion and city and transport characteristics. Simultaneously, the effect of the street pattern on the applicability of each structure is evaluated comparing these results to a previous research for a grid city. Three basic structures are analyzed: a radial scheme, a direct-trip-based network, and a hybrid structure as a transfer-based alternative. Each structure is dominant for a specific range of dispersion: radial networks for scenarios of high concentration, direct-trip-based systems for intermediate degrees of dispersion, and transfer-based structures when the activities are decentralized. However, constraints on stop capacity modify these ranges. Each structure presents a different distribution of travel time in the transit chain and agency costs that determine the most competitive alternative. In addition, the behavior of the structures and the evolution of costs regarding urban decentralization are practically the same for both street patterns: system costs grow with increasing mobility dispersion, the range of applicability for each structure is the same, and changes in their applicability when main input parameters vary are very similar. Therefore, these results make it possible to generalize about the conclusions obtained independently of the street layout.

中文翻译：

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环形辐射城市面对城市分散的公交网络结构比较

面对与城市分散程度不同相关的交通方式，本文扩展了关于公交网络设计的讨论。基于分析方法，比较了环形辐射城市的不同网络结构之间的总成本，这是另一种最常见的常规城市布局。结果明确了哪种结构是分散和城市与交通运输特征不同场景的最佳解决方案。同时，将街道模式对每个结构的适用性的影响进行了评估，并将这些结果与网格城市的先前研究进行了比较。分析了三个基本结构：径向方案，基于直接旅行的网络以及作为基于传递的替代方案的混合结构。每种结构在特定的色散范围内都是主要的：当活动分散时，用于高集中度方案的径向网络，用于中间分散度的基于直接行进的系统以及基于转移的结构。但是，对停止能力的限制会修改这些范围。每个结构在运输链中的旅行时间分配和代理商成本都有不同的分布，这决定了最具竞争力的替代方案。此外，两种街道模式的结构行为和有关城市分权的成本演变实际上是相同的：系统成本随着流动性分散性的增加而增加，每个结构的适用范围相同，并且当主要输入参数的变化非常相似。因此，