Phoenix Sky Harbor International Airport (PHX) is building a bridge that, on the surface, looks like a fairly straightforward piece of airport infrastructure. Taxiway Uniform, or Taxiway U, will span roughly 2,060 feet across the western end of the airport, connecting the north and south airfields and giving aircraft a second way to move between the two runway complexes. The project is expected to be completed in 2027 and carries an overall budget of $332.9 million.