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文中通过在广乐高速公路南段进行绿化边坡植物配比试验,确定了最佳边坡绿化效果的植物配比,可为我国南方地区高速公路建设的景观方案设计提供参考。 相似文献
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��������ͼ�ı����е�·��ͨ״������ָ����о� 总被引:1,自引:0,他引:1
各种仪器设备采集了大量的城市道路交通实时信息数据,但目前所能利用的信息仍较为稀少。研究如何利用这些丰富的信息数据资源极具意义,也十分必要。本文基于对北京市快速干道实时采集的RTMS数据的分析,以交通流理论为基础,结合统计分析方法提出一种基于特征图的道路交通状况量化评价指标模型。具体将模型应用于北京市二、三、四环的交通状况分析,取得了具有一定实际应用意义的量化评价指标。最后,应用多成份Gauss混合模型对交通流参数的分布实施拟合,并采用EM算法进行参数估计,就指标的合理性和可信性做出了进一步的评价分析。 相似文献
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山区高速公路危险路段安全设施设计对策 总被引:1,自引:0,他引:1
通过对山区高速公路危险路段的危害程度和道路使用者需求进行分析,提出有针对性、合理性的安全设施设计对策,弥补因山区高速公路几何线形设计不足而可能产生的危害. 相似文献
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王忠仁 《重庆交通大学学报(自然科学版)》2009,28(4):728-732,767
高速公路交通拥挤定量为高速公路定量管理的关键内容之一。介绍了利用探测车方法进行交通拥挤定量,并讨论了该方法的优缺点,同时也指出了实践应用过程中的注意事项。 相似文献
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基于高速公路联网通信系统的特点和功能,对高速公路联网通信系统各种媒体业务进行了系统分析,然后从网络、链路和接点三个层面出发,分别建立了高速公路联网通信系统接入与骨干容量分析、计算和分配方法. 相似文献
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随着我国交通事业的不断发展,桥梁拼接施工技术在高速公路扩建工程中的应用变得日益广泛。基于此,分析了常见高速公路扩建工程中桥梁拼接的施工方案、施工技术及质量控制,旨在促进高速公路扩建工程桥梁拼接施工质量。 相似文献
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ABSTRACT A scientific consensus has recently emerged suggesting that the dominant twentieth century paradigm of solving transportation congestion problems by building more freeways failed. The legacy of the freeway construction era is clearly visible in polluted and congested cities worldwide. To battle these ills, planning academics have been promoting more sustainable built form aligned with dedicated public/active transport provision. Partly as a result of the push coming from academia, a number of cities have sought to remove their freeways and replace the freed up space with alternate transport infrastructure, such as streets and boulevards. To discern if the transportation planning profession is currently undergoing a paradigm shift or whether freeway removal is merely a temporary fad, we have conducted a systematic review of the literature. In this article, we unpack the underlying reasons which have led some cities to removing their freeways. Results reveal that a paradigm shift has arguably not yet taken place in transportation planning. While many cities are creating human-scale and active transport spaces, currently these spaces tend to coexist alongside freeways. American cities, which were once the pioneers of freeway construction, appear to be lagging behind cities in Europe and Asia in this respect. If the current pace of freeway removal continues, it may take a few decades before the transportation planners, politicians, policy makers, and communities adopt radically different norms, methods, and goals. However, a radical approach may need to be taken sooner given alarming global warming predictions. 相似文献