The "road" is paved with gravel, and the center of the road is slightly higher and flat, which is conducive to the rainwater flowing to the roadside and does not affect the traffic. Later, people paved it with asphalt, which was called "asphalt road". But most people are still used to calling it "road". Since "road" is not "the road of horses", how did this name come from? It turns out that in the middle of the18th century, there was an industrial revolution in Britain, and the development of industry urgently needed to improve the traffic conditions at that time, especially the land traffic. To this end, the Scottish John McCardan invented and designed the "road" mentioned above. Because of the appearance of "road", Britain not only has smooth waterways, but also convenient land, which provides convenient conditions for the rapid development of British industry and trade. People take the designer of this road as their surname and call it "Road" to commemorate it.