Abstract: High-Five because 5-levels pass over each other. Some points are as tall as a 12-story building, and about 500,000 commuters pass through it daily. The project required 37 permanent bridges and six temporary bridges to be built. Additionally, 300,000 square feet of retaining wall and 74,000 square feet of drainage pipe run along the interchange. In 2006, the American Public Works Association selected the interchange as one of its "Public Works Projects of the Year."
Abstract: Wow! And we thought Boston's Big Dig was a major undertaking. This 7-mile freeway tunnel through the heart of Nagoya is under construction in this photo, and really cool!
Abstract: The Cross-Harbour Tunnel is the first tunnel in Hong Kong built under water. It has become one of the most congested roads (mainly towards Hong Kong Island direction) in Hong Kong and the world. The tunnel was constructed using the Immersed tube method. Source: wikipedia/Cross-Harbour_Tunnel