城市快速路功能可靠度量化评价与实证研究

发布时间：2018-04-24 11:04

本文选题：交通工程 + 功能可靠度　；参考：《公路交通科技》2015年09期

【摘要】：依据《城市道路工程设计规范》关于快速路功能的阐述,提出了城市快速路功能可靠度的概念,作为定量评价快速路功能实现程度的概率测度指标。结合行车速度和车头时距变异系数,构建了快速路功能可靠度的计算方法,并探讨了其与服务水平指标相比,对于评价道路实际使用功能与规划设计功能之间吻合程度方面的异同点。最后以郑州市3处快速路路段为例,基于视频采集实地数据资料,论证了行车速度和车头时距变异系数之间的独立性。结果表明:功能可靠度的计算结果与服务水平分析结果相吻合,并可对服务水平分析结果进行补充,验证了所提方法的可行性与适用性;与服务水平比较,功能可靠度量化了道路功能的完成程度,且无需给出明确的分界点,更有助于管理者做出判断与决策。
[Abstract]:Based on the exposition of the function of expressway in Urban Road Engineering Design Code, the concept of functional reliability of Urban Expressway is put forward, which can be used as a probability measure index to quantitatively evaluate the degree of function realization of Expressway. Combining with the variation coefficient of driving speed and headway distance, the calculation method of functional reliability of expressway is constructed, and compared with the index of service level, The similarities and differences between the function of actual use and the function of planning and design are discussed. Finally, taking three expressway sections in Zhengzhou as an example, based on the field data collected by video, the independence between driving speed and the variation coefficient of headway distance is demonstrated. The results show that the calculated results of functional reliability are consistent with the results of service level analysis, and can complement the results of service level analysis, which verify the feasibility and applicability of the proposed method, and compare with the service level. Functional reliability quantifies the degree of completion of road function, and does not need to give a clear demarcation point, which is more helpful for managers to make judgments and decisions.
【作者单位】：郑州大学土木工程学院;
【基金】：国家自然科学基金项目(51278468)
【分类号】：U491.1

【参考文献】