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China took nine years to build the world's largest sea-crossing bridge

It cost approximately $20 billion

It cost approximately $20 billion.

Mexico paving Devil's Backbone, adding 63 tunnels and 32 bridges

Civil engineers in Mexico are in the midst of an ambitious project to span the infamous Devil's Backbone. Until now, if you wanted to cross the twisted span of the Sierra Madre that separates Durango from the coastal city of Mazaltan, you had to either take an eight-hour detour that circumnavigated the mountains or risk life and limb by tackling the dirt road that snakes through drug country. When the project wra

REPORT: More than 25% of US bridges are "structurally deficient or functionally obsolete"

Here's some bad news for all of us: Over 150,000 bridges in the U.S. have been judged to be "structurally deficient or functionally obsolete." And get this, there are less than 598,000 bridges in America. That means 25.7% aren't in very good shape. It turns out that the state with the most structurally deficient or functionally obsolete (SD/FO) bridges is Texas, with 9,564 such bridges. However, Texas is ginormous – almost half the size of Alaska – and therefore has a lot of bridges,