In the united states , for example , more than 20 percent of all fatal crashes occur between midnight and 6 a . m . , thoughless than 3 percent of daily traffic volume is on roadways during these hours 据统计，在美国超过20 %的车祸通常都发生在午夜至凌晨6点之间，尽管在这一时段路上的车流量不到全天的3 % 。
More than half the government cars in beijing will be bannedfromstreets between novr 1 and 6 to ensure smooth traffic flowduringthe four - day china - africa co - operation forum summit 报道说：为期四天的“中非合作论坛”峰会将在北京召开。届时，为保证车流量畅通，北京大半公车将在11月1日至6日期间暂时封存、不得上路。
More than half the government cars in beijing will be banned from streets between nov . 1 and 6 to ensure smooth traffic flows during the four - day china - africa co - operation forum summit 报道说：为期四天的“中非合作论坛”峰会将在北京召开。届时，为保证车流量畅通，北京大半公车将在11月1日至6日期间暂时封存、不得上路。
More than half the government cars in beijing will be banned from streets between november 1 and 6 to ensure smooth traffic flow during the four - day china - africa co - operation forum summit 报道说：为期四天的“中非合作论坛”峰会将在北京召开。届时，为保证车流量畅通，北京大半公车将在11月1日至6日期间暂时封存、不得上路。
He saw that traffic on a stretch of u . s . 1 was light enough for him to land in the southbound lanes without endangering any vehicles , then put his plane down and coasted over to the side of the highway 飞机急需要找到一处宽敞平坦的地方紧急迫降，这时他看到美国1号公路上有一个路段车流量较少，完全可以在不危及行驶车辆的前提下在朝南的车道上降落。
The collection of real - time traffic data , such as traffic load , average travel speed , vehicle classification , and lane occupancy , plays a critical role in the advanced traffic management system and traveler information systems 实时交通流数据的采集，包括车流量统计、车道平均车速、车型分类、车道占有率等，在智能交通系统中起着重要的作用。
There is “ congestion externality ” because we cannot charge from every vehicle for traffic congestion , so actual vehicle flow rate is higher than that of optimum equilibrium and traffic congestion cannot be solved by market 由于不能就“拥堵”分别向每辆车收费，因而存在“拥挤外部性” ，道路实际车流量会高于最佳均衡车流量，因而拥堵也不能被自动解决。
Besides , the fast and busy cars flux , the complicated variable landforms make the highway extremely hot in summer , cold and windy in winter , and the atmosphere is seriously polluted . all these factors go against the growth of plants 另外，快速繁忙的车流量、复杂多变的地形等因素使得高速公路夏季高温高躁、冬季高寒高风、空气污染严重等等，非常不利于植物生长。
The results show the complicated evolution process of traffic flow . the flow of vehicles can be controlled by the coupling coefficient . different values of have different effects on the critical point from free to jam phase 计算机数值模拟结果表明，在车流状态的演化过程中，通过确定车道耦合系数来控制车流量，不同的耦合系数车流量不同，对车辆运动出现堵塞项的相变点有影响。
The most distinctive parts would be described in the following aspects : 1 . because the contact traffic detection device only can measure little information and be easy to fail , we propose a new traffic flow detection algorithm using virtual trapline 论文研究内容主要有以下几个方面： 1针对现有基于非模型的车流量检测算法的不足，提出了一种基于彩色虚拟检测线的交通信息采集方法。
