不知不觉中,人们脚下的路面在悄悄地发生着变化。以北京为例,当汽车行驶到二环路雍和宫到东直门的转弯处时,会发现此处路面与别处不同,呈暗红色,司机不知不觉就会放慢速度。原来此处为事故多发地,改变路面颜色一是引起司机注意,二是路面加铺了一层特殊颗粒状防滑材料,摩擦力加 Unknowingly, people under the feet of the road is quietly changing. Take Beijing as an example. When driving to the turning point of the Lahuan Gong 2nd Ring Road to Dongzhimen, it will find the road here is different from elsewhere, dark red, the driver will slow down unconsciously. Originally here is the place of accident, changing the pavement color is caused by the driver’s attention, the second is paved with a layer of special granular non-slip material, friction plus