Road Warrior

Cities investing billions in airport expansions, upgrades

Harriet Baskas, Special to CNBC

Nursing rooms, private changing rooms, circadian lighting, pop-up shops and a 23-foot-tall wall of windows offering views of the airfield and the Bay Area are among the fresh amenities passengers will find at San Francisco International Airport when a renovated boarding area in Terminal 3 reopens Tuesday.

The $138 million makeover of 10 gates in Boarding Area E, which serves United Airlines, also includes SFO's second yoga studio, Bay Area-centric food and retail shops, furniture that includes the iconic Fritz Hansen "egg" chairs and swivel-lounge seating, and a kid's play area with an interactive art installation.