水泥稳定碎石冷再生技术在公路路面改造中的应用

文章以国道G324线岑溪至容县（容县段）一级公路路面改造工程为例,总结水泥稳定碎石冷再生施工工艺,分析其应用的经济效益与社会效益,并结合工程应用的效果,评价稳定碎石冷再生技术是一种经济合理的路面改造方式,具有较高的应用价值.     

硫磺沥青路面技术在广西的应用前景分析

文章以广西高速公路建设为背景,从技术性能、社会经济效益角度入手分析了硫磺沥青路面技术的优势,介绍了硫磺沥青路面技术在广西地区的工程应用情况,并阐述了该技术使用过程中面临的问题及应对措施。     

浅谈施工过程中混凝土的质量控制

简述了在施工过程中易造成混凝土质量问题的几点常见因素,从施工角度方面论述了控制混凝土质量的几种方法。     

Impacts of freeway accidents on CO2 emissions: A case study for Orange County,California, US

Traffic congestion caused by traffic accidents contributes to CO₂ emissions. Generally, more efficient and prompt responses to accidents lead to reduced traffic congestion as well as CO₂ emissions. Here we assess the CO₂ emissions impacts of freeway accidents, applies an existing model to capture spatio-temporally congested regions caused by freeway accidents. A case study for the assessment of CO₂ emissions impacts of based on the results from the model is presented.     

On macroscopic freeway merge behavior: Estimation of merge ratios using asymmetric lane flow distribution

Data from several freeway merges reveal that, contrary to some previous findings, merge ratio can vary within a site with respect to the merge outflow and that the existing merge ratio estimates based on lane counts are not able to predict this within-site variation. Furthermore, the merge ratios estimated based on two well-known merging principles, “fair-share” and “zipper,” are found to be inaccurate for merges where merging streams compete directly due to a lane drop. In light of these findings, we estimate merge ratios using lane flow distribution (LFD) to better predict between and within site variations of merge ratio. In addition, we propose a merging principle specific for merges with a single lane-drop. The model was developed to better represent observed non-uniform redistribution of merging flow not captured by the current merge ratio estimation methods and merging principles. Empirical observations show that the proposed methods are able to improve merge ratio estimates, reproduce within-site variations of merge ratio, and represent more accurately non-uniform redistribution of merging flow dependent on the merge geometry.     

A multi criteria decision analysis technique for including environmental impacts in sustainable infrastructure management business practices

This paper presents a decision analysis technique to allow highway agencies to assess the tradeoffs between costs, condition and energy consumption. It is shown how the entire feasible solution space can be evaluated between multiple stakeholders with differing values to assess the desirability of the outcomes resulting from infrastructure management decisions. Furthermore, an example network-level analysis is presented using data from the Virginia Department of Transportation. The example analysis clearly shows a tradeoff between the most cost effective outcomes (i.e., minimizing the cost divided by the condition) and the outcomes where the energy consumption is minimized, and how decision analysis should account for this tradeoff. The results of the method presented in this paper show that various pavement management alternatives can be represented in terms of desirability, and that this desirability can assist the decision maker with making decisions about performance goals and targets.     

高速公路交通灾害预警模型研究

在对高速公路交通灾害进行调查分析的基础上,考虑影响交通灾害预誓的主要因素。基于未确知测度理论建立各主要影响因素的未确知测度函数,利用熵确定各影响因素的指标权重,依照置信度识别准则进行预警等级判定,从而获得交通灾害预警结果．并将该预警模型应用于新疆高速公路交通灾害预警,研究结果表明,该方法能解决高速公路灾害评价中诸多因素不确定性问题,可以在实际工程中进行推广应用。     

高速公路出口匝道与地面道路衔接部的几何安全设计研究综述

高速公路出口匝道与地面道路衔接部的几何安全设计是高速公路出口匝道几何安全设计的核心内容．本文通过分析国内外出口匝道与地面道路衔接部几何安全设计研究成果,从衔接部的接入间距设计、视距设计、转弯缓冲区的设计、渠化设计和控制方式选择等方面进行了探讨,指出了我国现行规范中衔接部几何安全设计的局限性。最后,文章建议借鉴国外已有的衔接部几何安全设计的实践经验,研究适合我国国情的衔接部几何安全设计方法,为改善高速公路匝道出口区域内的交通流通行效率和交通安全提供必要的理论支撑和技术依据。     

浅谈我省普通公路路面自动化快速检测技术的研究与应用

主要介绍了路面自动化快速检测技术在我省普通公路的应用情况,同时以黑大线为例进行普通公路的路面技术状况分析与评定,研究路面自动化快速检测技术在普通公路养护管理科学化进程中发挥的重要作用。     

路面碎石质量的控制方法

阐述了路面碎石质量的控制方法,只有从原石的选材、破碎、筛分、储备等环节上采取针对性的控制,并根据矿料的性能采取不同措施进行改善,才能有效保证路面用碎石质量满足要求。