唉,又堵车了!我摇头叹气,无奈地闭目养神……突然间,公路变宽了,车前自然地出现了一条车道,我们的车可以畅通无阻啦!我低头一看——塑胶路面,彩色分道,路面具有伸缩性。车流量少时,路面变窄,人们可以充分利用土地;车多拥挤时,路面变宽,可以很好地解决 Oh, and the traffic jam! I shook my head and reluctantly closed my eyes ... Suddenly, the road widened, a car naturally appeared in the lane, our car can be smooth! I looked down - plastic pavement , Color separation, the road has flexibility. When the traffic flow is small, the pavement becomes narrower and people can make full use of the land. When the car is crowded, the pavement becomes wider and can be well solved