Corrections & Clarifications: An earlier version of this article gave incorrect information about which PHX Sky Train light rail stops have access to Phoenix Sky Harbor International Airport.

The Phoenix Sky Harbor International Airport announced that the PHX Sky Train will be temporarily shut down from 10 p.m. Wednesday, Jan. 3, to 6 p.m. Thursday, Jan. 4, for system upgrades and testing.

PHOENIX — The final phase of the PHX Sky Train at Phoenix Sky Harbor Airport opened Tuesday, connecting the terminals to the car rental center. The 2.5-mile extension adds two stations to the ...