In Spring 2020, travelers will start seeing the prep work for a three-year, $1.1 billion construction project on a new terminal at Pittsburgh International Airport.

Airport visitors will begin to see construction trailers and new walls and fencing built to isolate the construction area from existing facilities, according to the Allegheny County Airport Authority.

The project—scheduled for completion in 2023—includes a new landside terminal connected to the existing airside terminal, a multilevel parking garage with approximately 3,000 spaces and a new roadway system for terminal access. The Allegheny County Airport Authority is funding the modernization program.