Journal of Transportation Systems Engineering and Information Technology ›› 2023, Vol. 23 ›› Issue (6): 22-32.DOI: 10.16097/j.cnki.1009-6744.2023.06.003

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Evaluation of Road Network Density Based on Structure, Efficiency, Fairness and Resilience

DENG Mao-ying*1,DENG Ce-fang2   

  1. 1. Gangzhou Municipal Planning and Natural Resources Bureau, Guangzhou 510030, China; 2. College of Design and Engineering, National University of Singapore, Kent Ridge 119077, Singapore
  • Received:2023-09-17 Revised:2023-10-16 Accepted:2023-10-20 Online:2023-12-25 Published:2023-12-23

基于结构、效率、公平与韧性的路网密度适宜性评价研究

邓毛颖*1,邓策方2   

  1. 1. 广州市规划和自然资源局,广州 510030;2. 新加坡国立大学,设计与工程学院,肯特岗119077,新加坡
  • 作者简介:邓毛颖(1973- ),男,广东徐闻人,教授级高级工程师,博士。

Abstract: Road network density serves as a critical indicator reflecting the state of transportation and urban development. It plays a pivotal role in territorial spatial planning and urban assessment. However, in practical planning, the evaluation of road network density often relies on recommended specifications or benchmarks from advanced international cities, lacking quantitative standards and methods. This study first identifies four fundamental dimensions for evaluating road network density: road network structure, road network efficiency, road network fairness, and road network resilience. A comprehensive road network density evaluation system is established that comprises 10 distinct indicators based on these four dimensions. In response to the challenge of determining weights for these multidimensional and multi-indicator dimensions, an enhanced CRITIC weighting method is employed to categorize and assign weights to the constructed indicator system. The final comprehensive evaluation result is obtained by solving the first and second level weights. Taking the Pearl River New Town Financial City area in Tianhe District of Guangzhou as a case study, we create three typical road network density development models and construct a road network model for quantitative evaluation and comparative analysis using the developed evaluation system. The results indicate that efficiency and fairness indicators carry the highest weight in the road network evaluation of the CBD area. Simultaneously, the dimensional assessment reveals that excessively high road network density can hinder efficiency. As road network density increases to a certain point, the improvements in road network structure and resilience show a diminishing trend. Consequently, there exists an optimal road network density for CBD areas, as opposed to a 'more is better' network. This multi- dimensional indicator system overcomes the limitations of a single evaluation metric and enables a comprehensive assessment of road networks in various functional areas.

Key words: urban traffic, road network density, CRITIC weighting method, road network efficiency, fairness of road network, road network resilience

摘要: 道路网密度是反映交通与城市发展水平的综合性指标,已经纳入国土空间规划和城市体检的核心指标体系。但目前对路网密度的评价往往简单地引用规范推荐值或对标国际先进城市,存在不够精准,缺乏系统性的问题。为此,本文首先从路网核心功能出发,提炼评价路网密度的4个维度,包括路网的结构、效率、公平性和韧性,以4个维度为基础构建涵盖10项指标的路网 密度评价体系;然后,针对多维度多指标存在的量纲不一致和各维度权重不易确定等问题,采用改进的CRITIC(CRiteria Importance Through Intercriteria Correlation)赋权法对指标体系进行分级赋权,通过求解一级权重和二级权重,得到最终的综合评价结果;最后,以广州市天河区珠江新城—金融城片区为例,设定3种典型的路网密度发展模式,构建路网模型开展实证研究。结果显示,对于CBD(中央商务区)地区,路网效率和公平性指标的权重最高;分维度的评价结果显示,路网密度过高对效率有所抑制,路网密度增加到一定程度后,对结构和韧性的提升呈现边际效用递减趋势。因此,对CBD地区而言,存在适宜路网密度,而非路网密度越高越好。本文提出的指标体系可避免单一评价指标的局限性,实现对不同功能区路网的差异化综合评价。

关键词: 城市交通, 路网密度, CRITIC赋权法, 路网效率, 路网公平, 路网韧性

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