目前全国各城市使用的交通标志牌普遍都采用固定不变的一种符号或图案的标志牌。在相当多的路口、路段设置了时间性禁令标志或其他标志，这必须在标志下端附加一块牌标明禁行起止时间，这样势必分散驾驶员的注意力，使司机难以看清对附加牌的使用，容易造成违章．而且在车辆高 At present, all kinds of traffic signs used in various cities across the country generally use a fixed sign or a symbol of the logo. At a considerable number of junctions, time-bound signs or other signs have been set on the road sections. This must be accompanied by a card at the bottom of the sign indicating the starting and ending time of the ban, which disturbs the driver’s attention and makes it difficult for the driver to see the use of the attached card , Easily lead to illegal. And high in the car