World's longest undersea highway tunnel completes main sheild tunneling in E China

The main shield tunneling work on the world's longest undersea highway tunnel — the second undersea tunnel of Jiaozhou Bay — was completed on Tuesday in Qingdao, east China's Shandong Province.

The 17.48-km-long tunnel, with a 9.95-km section beneath the sea, has a designed speed of 80 km/h and will facilitate regional travel.