Wilson Electric was selected by Bombardier Transportation to provide design-build electrical construction services for the maintenance and storage facility and Stage 1 of the guideway installation from the East Economy parking structure to Terminal 4. The contract value for this phase of the project is in excess of $18 million. The PHX Sky Train (formerly known as the Sky Harbor Airport Automated People Mover ) is a people mover under construction at Sky Harbor International Airport in Phoenix, Arizona. Shuttle buses along Sky Harbor Boulevard currently connect METRO's Airport station (called "44th Street and Washington") with all terminals; these will be replaced by the people mover once it opens. Sky Train will feature a 100-foot-tall (30 m) bridge over the taxiway that connects the north and south runways, the first location in the world where a train will pass over an airplane. Phase I of construction, underway since December 2008, will link Terminal 4, the East Economy Parking lot, and the 44th Street light rail station (the latter via a moving sidewalk bridge). Eventually, Sky Train will link to all airport terminals and the Rental Car Center. It will run in a new guideway, using an underpass (below the Union Pacific railroad) which was part of former State Route 153. Estimated cost was just over $1 billion in 2005, which is close to the cost of the 20-mile METRO line. Sky Train Phase I is to be completed in 2013, and the system should be complete by 2020.