**Figure 17.**

*Progress and accuracy report.*

data driven and intelligent construction control technology. Through the application of the above technical measures, the traditional manual calculation, measurement, adjustment and control is replaced by a new intelligent mode. At present, after more than 10 years of research, this technology has advanced to form a complete technical system, which has been applied in more than 11 high-speed railway projects such as Zheng-Xu, Chang-Gan, Shang-He-Hang and Fu-Xia. The submillimeter precision control of ballastless track is realized, the efficiency and intelligence level of construction are improved, and significant social and economic benefits are achieved.
