Hai Van tunnel is covered with the main tunnel of 6,280m in length, 10m in width, the emergency tunnel of ,280m in length and 4.7m in width. The ventilation tunnel has the length of 1,810m, and the width of 8.2m.
Bai Chay bridge is placed in NH18. It is a way linking Hon Gia and Bai Chay under Quang Ninh province. Total length of the bridge is 903m designed with 5 spans. The main span has the length of 435m. The cross section of the bridge is 25.3m serving for 4 motored vehicle lanes and 2 non-motorized vehicle lanes.
NH 5 is the life-line traffic route connecting Hai Phong city and Hanoi With total length of the route is106km, with the cross section of 26m 35m, NH5 serves for 4-6 motorized lanes. It is designed with the speed of 80km /h.
Cau Gie- Ninh Binh highway is the one under the program on development of highway network in Vietnam. Total length of the route is 56km with 6 lanes and the design speed of 120km/.
Dong Tru bridge is placed in NH5 (extension) via Duong River in Hanoi city. It is designed in concrete steel arch bridge with total length of 1138,2m, the main span is structured by 80+120+80. Its cross section width is 54.5m with 6 motorized lanes, 2 bus lanes, 2 complex lanes and 1 standby section for urban railway.