论文部分内容阅读
在改善能见度和划好道路标线等的路段内,可使事故率下降75％。国外道路划线材料,除使用各种油漆外,还利用热塑性材料、彩色混合料、浆沫和人工合成材料,陶瓷砖、混凝土块件和其它混合料及使道路设施闪光和反射发光的金属材料等。为防止汽车轮胎打滑,路标线应有一定粗糙度。 交通安全还在较大程度上取决于汽车车轮与道路接触的可靠性,国外不少国家中,允许最低附着系数值采用0.4。 防冲护栏是降低和预防重大道路交通事故的主要手段之一。美国俄亥俄州使用W形截面的金属护栏与方形和圆形断面栏柱相结合的试验证明:木制栏柱在汽车冲撞护栏时危险性较小。美国为缓减在危险路段发生的冲撞,常安装液压缓部器,这是由许多塑料管所组成,相互联通、灌满水或防冻液的一种联通容器。英国研制了由装配式钢筋混凝土元件组成的刚性安全护栏结构,安装在专用支柱上。法国仍采用沿
The accident rate could be reduced by 75% in the sections of improving visibility and making road markings. In addition to using a variety of paints, marking materials for foreign roads also utilize thermoplastic materials, colored mixtures, grouts and synthetic materials, ceramic tiles, concrete blocks and other mixtures, and metallic materials that shine and reflect roadworks . To prevent car tires skidding, road signs should have a certain degree of roughness. Traffic safety is still largely dependent on the reliability of vehicle wheel and road contact in many foreign countries, allowing the lowest adhesion value using 0.4. Anti-impact fence is to reduce and prevent one of the major means of road traffic accidents. Experiments using a combination of a metal fence of W-shaped section and a square and circular section fence in Ohio of the United States of America have proved that wooden fence columns are less dangerous when the vehicle collides with the fence. In order to mitigate the clashes in dangerous sections, the United States often installs hydraulic pressure builders, a type of interconnected container made up of many plastic pipes interconnected and filled with water or antifreeze. The UK has developed a rigid safety barrier structure consisting of fabricated RC elements installed on a dedicated pillar. France is still using along