The first section of the nearly $4 billion World Trade Center Transportation Hub is now open to the public. Designed by world-renowned architect Santiago Calatrava, the World Trade Center West Concourse is a study in white, and gives New Yorkers the chance to experience Calatrava’s famous articulated ribs on a daily basis. The new 600-foot-long passageway replaces a temporary pedestrian bridge over West Street and allows commuters to get from the WTC PATH Station to offices on the far West Side without having to walk up to street level.