Throughout the 1990s, passenger volumes doubled at Portland International Airport (PDX), making it one of the fastest growing airports in the United States. To address the increased facility needs, the airport launched PDX 2000, a three-phase development program. The first phase of the program—Terminal Access Program (TAP)—improved access to the main terminal building and increased close-in parking to meet the needs of greater airport traffic.

ZGF designed a 120,000-square-foot glass and steel canopy to cover the entire roadway system, as well as four new vehicle lanes at the upper (ticket lobby) level and three new lanes on the lower (baggage claim) level. These improvements and a new entry ramp on the north side helped to relieve traffic congestion and, combined with new center islands, effectively double the curb space for passenger loading and unloading. The original three-story parking garage was expanded to seven levels, more than tripling in capacity from 1,050 to 3,400 public parking spaces.