交通影响评价中的交通区分割方法研究

Method of Traffic Analysis Zone Partition for Traffic Impact Evaluation

为了在交通影响分析中准确预测道路网络的宏观交通流和局部路口的微观交通流特征,开发了利用交通量分配模型和交通仿真技术组合分析交通影响的方法。首先在地理信息系统(GIS)的支持下,利用Voronoi图对交通小区进行几何分割,并借助GIS的空间聚合分析功能分割相应的属性数据,然后利用MCI(Multiplicative competitive interaction)模型推求新OD矩阵。从而使交通需求预测模型的输出结果可以直接作为交通仿真的初始数据,以便利用交通仿真技术实施关键路口的微观交通流分析。最后通过一个试验验证了方法的有效性和精度。

In order to predict and analyze the attributes of macro traffic flow on road network and micro traffic flow at intersection accurately during the traffic impact analysis, a method of combining traffic volume distribution model with traffic simulation is developed. First, based on the Geography Information System （GIS）, Voronoi diagrams are used for traffic analysis zone （TAZ） partition, and the attribute data is also partitioned correspondingly. Then, Multiplicative Competitive Interaction （MCI） model is adopted to estimate the new OD matrix. As a result, the output of traffic demand model can he input to micro traffic simulator directly to simulate and analyze the micro traffic flow. Finally, a numeric test is done to show the validity and accuracy of the presented method.