Chapter III is the focus of this paper, from GIS technology data management, information visualization capabilities, analysis of space transportation systems to deal with road network evaluation.
第三章是本文的重点，分别从GIS技术的数据管理、信息可视化能力、空间分析方面来处理公路网交通系统评价问题。
There is not a systematic set of urban road network evaluation system in our country at present. Different planning need choose the proper evaluation method and set up the evaluation index system.
目前我国城市道路网的评价没有一套较为系统的城市道路网评价体系，对于不同规划方案需要选择相应的评价方法并建立评价指标体系进行分析。
To enhance the validity of evaluation, based on ANN(artificial neural network), a comprehensive evaluation model of the safety of road traffic based on BP(back propagation) neural network was built.
为了提高评价的准确性，采用人工神经网络技术，建立了基于BP神经网络的道路交通安全综合评价模型。
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