News from the Sky: PHX Sky Train® Stage 2 Promotes Sustainability

Phoenix Sky Harbor International Airport

The new Stage 2 extension of the PHX Sky Train® at Phoenix Sky Harbor International Airport (PHX) is more than moving passengers—it incorporates a major emphasis on protecting our environment.

Stage 2, which opened to the public in December and connects Terminals 3 and 4 to the Rental Car Center, is projected to slash carbon emissions by 69,000 tons annually. It’s also more than doubling the train’s current daily ridership to about 35,000 passengers. Over time, that figure will jump to 79,000 passengers each day.

This new extension removed 84 Rental Car Center (RCC) buses, as well as thousands of vehicles from airport streets each day. And the train is being powered with electricity that is 50% supplied from carbon-free energy sources.

The new, three-car configuration is equivalent to replacing five shuttle buses in terms of number of passengers.

The Institute for Sustainable Infrastructure (ISI) has awarded Stage 2 an Envision Gold Award for sustainability. It marks the airport’s first Envision award and only the third Envision-awarded project in Arizona.

In addition to the sustainability features, the PHX Sky Train® provides a quieter, quicker, and more comfortable travel experience between the terminals and the RCC. It takes under 8 minutes to go from Terminal 4 to the RCC and about 13 minutes to ride the entire five miles from the 44th Street Station to the new Rental Car Center Station.

Trains arrive and depart every three to five minutes, 24 hours a day.

Other benefits include:

* Freeing up curb space at terminals.

* Transitioning the airport’s CNG-fueled buses to an all-electric train.

* Providing a new 1,600 space 24th Street Express Pay lot that will be convenient for customers coming to the airport from the west (which will further reduce traffic on Sky Harbor Boulevard.)

* Creating a new “front door” to Sky Harbor on the west side of the airport.

The project cost approximately $745 million, but no tax dollars were used. It was paid for with Rental Car Customer Facility Charges and airline Passenger Facility Charges.

For more information, please visit