The imperial highroads were begun in the twenty-seventh year of the First Emperor of Qin (220 BCE), running out from Xianyang to the whole realm.
The Straight Road was built under Meng Tian from 212 BCE, from Yunyang north to Jiuyuan, more than seven hundred kilometres long. The builders cut through hills and filled valleys, digging the mountains open and levelling the gorges, and made it the military road to the northern frontier.
With this road, troops and orders could pass between Guanzhong and the north. The Han went on using the Straight Road, with post stations and passes along it.
Qin Straight Road is the class in the chapter on Infrastructure on the Straight Road of the Qin, which Meng Tian built from 212 BCE, running north from Yunyang to Jiuyuan. The road was over seven hundred kilometres long and served as the military road to the northern frontier, along which troops and orders passed between Guanzhong and the north.
