A Study of Developing the Measure of Permissible Building Volume Subject to the Maximum Capacity of a Road Network

本文从两个方面研究了在路网容量条件下分区最大允许建筑容积的确定方法：一是在路网最大容量计算中应考虑模型中分配的建筑容积引起的OD格局变化;在以往的模型中，OD模式已被固定。提出了一种新的模型来计算最大通行能力，通过引入交通的逆需求函数，以需求性能平衡约束代替固定的OD模式约束。第二个方面是土地利用活动的配置效率。在计算最大允许建筑楼层时，我们应该考虑土地使用活动的类型，因为不同活动的出行生成率和市场租金都有很大差异。我们提出了一个最优的土地利用活动分配模型，原来的Hervert-Stevens模型，这是众所周知的，因为它产生的市场均衡解，连接与链路容量约束。因此，解决方案是根据道路网络的最大容量的建筑物的最有效的占地面积体积。该模型应用于松山市中心区。计算结果清楚地显示了建筑允许层数与连接能力之间的关系。此外，它可以用来评估道路改善的效果。

We have studied the way to decide the maximum permissible building floor volume by zone subject to a road network capacity from the two aspects as follows.The first aspect is that the OD pattern change caused by floor volume allocated in a model should be involved in calculation of the maximum capacity of a road network. The OD patterns have been fixed in the former models. We propose a new model to calculate the maximum capacity by introducing inverse demand functions of traffics to replace the fixed OD pattern constraints with demand performance equilibrium constraints. Summing up the trip ends of OD traffic solutions in each zone we can calculateThe second aspect is the efficiency of land use activities allocated. We should think about the kind of land use activities when we calculate the maximum permissible building floor because both trip generation rates and bearable market rents are quite different among activities. We propose an optimum land use activity allocation model where original Hervert-Stevens model, which is well-known as it produces the market equilibrium solutions, is connected with link capacity constraints. Therefore, the solutions are most efficient floor space volume of buildings which are according to the maximum capacity of a road network. This model is applied in the central area of Matsuyama city. The computation restults show the relationships of the permitted levels of building floor and link capacities clearly. Moreover it can be used to estimate the effect of road improvement.