There is only one straight road from Xianyang to Jiuyuan, Baotou, the middle section of the Great Wall in Wan Li. At that time, outside the Great Wall of Wan Li, Xiongnu occupied and built a high-standard straight road to prevent Xiongnu from invading and harassing. The pavement width requires 50 steps, which is equivalent to the current two-way expressway.
The equator is a road leading to all parts of the country with Xianyang as the center. It is to rule and manage counties all over the country, transmit government orders and documents, feed back information, prevent local emergencies, and facilitate the dispatch of troops and transportation of grain and grass. There are post stations throughout the road, where soldiers are stationed to deliver government decrees and documents. At the same time, it is also a channel for logistics and transportation. Because the chidao has to pass through various sections with complex terrain, there were no explosives, excavators and other utensils at that time, so it is necessary to ensure that the chidao is unimpeded. Therefore, the corresponding roads, multi-roads, meridian roads, plank roads and Wuchi Road emerged, which showed the wisdom of ancient people in handling special affairs.
Wuchi Road is the pavement width requirement of the pool road in the crossing section. It was very difficult to build a five-foot-wide pavement on steep slopes and peaks at that time, but at that time, animals carrying goods occupied about four feet of pavement, and animal drivers had to go back and forth frequently to prevent emergencies, so the five-foot road was born.
Friends who like to know about ancient roads can skip looking at Qin Jiu's road map: the ancient road crossing the middle part of Taihang Mountain on the map is not imaginary. Now Shijiazhuang-Taiyuan Passenger Dedicated Line passes under it, and Shijiazhuang-Taiyuan Expressway Second Line, 207 national highway and Provincial Highway 3 14 all pass around it.