进一步完善公路建设项目可行性研究工作的探讨

分析了目前我国公路建设项目可行性研究工作中存在的主要问题,提出进一步提高公路建设项目可行性研究工作水平与质量的措施及建议.     

努力提高城郊公路服务水平的措施及对策

把城郊公路建设与城市化管理理念结合起来，是提高公路通行能力，解决交通瓶颈，改善交通环境的有效措施，也是长久之举。把部分公路或村屯路段承包给地方管理的经验，为公路养护减负、提高公路服务水平和逐步推行市场化养护提出了初浅的认识。     

Connected vehicle penetration rate for estimation of arterial measures of effectiveness

The Connected Vehicle (CV) technology is a mobile platform that enables a new dimension of data exchange among vehicles and between vehicles and infrastructure. This data source could improve the estimation of Measures of Effectiveness (MOEs) for traffic operations in real-time, allowing to perfectly monitor traffic states after being fully adopted. However, as with any novel technology, the CV adoption will be a gradual process. This research focuses on determining minimum CV technology penetration rates that would guarantee accurate MOE estimates on signalized arterials. First, we present estimation methods for various MOEs such as average speed, number of stops, acceleration noise, and delay, followed by an initial assessment of the penetration rates required to accurately estimate them in undersaturated and oversaturated conditions. Next, we propose a methodology to determine the minimum CV market penetration rates to guarantee accurate MOE estimates as a function of traffic conditions, signal settings, sampling duration, and the MOE variability. A correction factor is also provided to account for small vehicle populations where sampling is done without replacement. The methodology is tested in a simulated segment of the San Pablo Avenue arterial in Berkeley, CA. The outcomes show that the minimum penetration rate required can be estimated within 1% for most MOEs under a wide range of traffic conditions. The proposed methodology can be used to determine if MOE estimates obtained with a portion of CV equipped vehicles can yield accurate enough results. The methodology could also be used to develop and assess control strategies towards improved arterial traffic operations.     

BIM模型在信号运维系统中的轻量化研究

在铁路信号系统运维过程中,由于BIM模型中包含有建设阶段的信息,造成系统数据冗杂、交互时间长,又由于信号设备种类繁多、布局分散,导致系统规模庞大,无形中降低了工作效率.本文对BIM模型进行轻量化方法研究,提出采用细节面片抑制法对模型进行处理,以达到使BIM模型轻量化的目的,取得良好效果.     

民众参与农村公路建设的必然性与技术水平提高的迫切性

针对当前农村公路建设的新形势和新机遇，通过对农村公路建设特点，影响农村公路建设的几大因素及面临的困难和问题的分析，探索建立农村公路建设与管理机构的方法和措施。     

河池至都安高速公路典型示范工程过程控制措施探讨

文章结合河池至都安高速公路工程实例,介绍了该项目典型示范工程在"人本化、专业化、标准化、信息化、精细化"的原则要求下,实施过程控制的相关措施,为山区高速公路典型示范工程建设提供参考。     

广西公路环境问题分析与对策研究

文章对公路建设及营运的环境问题进行分析,提出了提高环境意识与健全制度、强化环境监督管理、制定工程与技术措施等对策建议,为相关部门防治公路环境问题提供参考。     

川江及三峡库区船型标准化研究

本文介绍了川江及三峡库区航运现状,分析了目前存在的主要问题,提出川江及三峡库区船型标准化的指导思想、总体目标、相关措施和政策建议。     

钻孔灌注桩质量问题及防治措施

简要介绍了为保证钻孔灌注桩的质量,在施工、监理过程中应注意的问题.     

甘肃省汽车检测行业发展状况的调查研究

汽车综合性能检测是道路运输的组成部分,对确保交通运输安全起着重要的辅助和促进作用。文章对甘肃省汽车综合性能检测行业的现状和问题进行了深入调查、研究和分析,对甘肃省汽车综合性能检测行业的可持续发展提出了合理化建议。