基于效率和安全的城市道路等级的自组织演化

Self-organization of hierarchies of urban roads based on efficiency and safety

通过简化城市路网,对具有不同的面积和土地利用结构的方格状路网进行了道路等级演化的仿真研究。构建了道路等级自组织演化的框架,并以道路等级更新前后路网总出行时间和交通事故次数的变化作为判断道路等级是否更新的依据,采用Matlab软件编程,不断更新部分道路等级,直到路网达到稳定。最后以6个不同规模的路网作为仿真研究对象,揭示了路网自组织演化的现象,发现高等级道路周边'其他类用地'所占比例较小;且对同等规模的路网而言,同等级道路周边各类用地性质的土地分布比较一致。

The evolvement process of hierarchies of simplified urban road networks with different areas and land utilization structures was investigated by computer simulation. The self-organization system framework of the hierarchies of urban roads was established. The difference of total traveling time and number of accidents before and after the updating of the hierarchies were regarded as the guide line that whether the road hierarchies should be updated. Matlab software was used to update the road hierarchies until the network achieving stabilization. Six road networks with different areas were studied to reveal the self-organization phenomenon of road network. It was found that, in the circumference of high hierarchy roads, other land-use types take a small proportion; in the circumference of road networks with the same area, different land-use types have consistent distribution.