3 meters. Official website shows that the reconstruction and expansion project of Zhangji section of 3 1 1 National Road in Taikang County of Henan Province started in July 20 19, mainly including road widening and subgrade reinforcement. The reconstruction scope of this project is 10.8km, the pavement width is widened from 7m to 10m, and the subgrade width is widened from 9.5m to 15m, with four lanes in both directions. This is a large-scale road reconstruction project. Therefore, it can be concluded that the Zhangji section of Taikang 3 1 1 National Highway has been widened by 3 meters.