Pudong is connected to Puxi by several tunnels and four major bridges. The first of these bridges were the Nanpu Bridge (1991) and the Yangpu Bridge (1993). The Xupu Bridge opened in 1996. The latest of these is Lupu Bridge, which is the world's second longest arch bridge and was completed in 2002. Currently there are five tunnels that link the two sides, Dapu Rd. Tunnel, the first tunnel across the Huangpu River, Yan'an Rd. Tunnel, running east–west, and Dalian Rd. Tunnel, running north–south, Fuxing Rd. Tunnel, complementing the Yan'an Rd. Tunnel, Waihuan Tunnel, one part of Shanghai Outer Ring Express. Two new tunnels linking Lujiazui to Puxi are under construction.