The Jinjiazhuang Long Spiral Tunnel under construction from Yan-chong Construction Office Of Hebei Expressways Investment , Hebei Highway & Waterway Engineering Consulting Co., LTD and Liaoning First
Jinjiazhuang long spiral tunnel is 4228 meters long; the right entryway is 4,104 meters long. World Records Certification Agency, with headquarters in England has declared it to be the World’s Longest Motorway Spiral Tunnel.
According to xinhuanet
