The passenger concourses were built in 1971 as part of an expansion that tripled the size of the airport.
Above the tracks, a 300 m long passenger concourse gives easy access to the platforms and is equipped with several travelators.
It was expanded from 1968 to 1970, which included the current passenger concourses.
The bus station was rebuilt in 2001 with a main passenger concourse and 24 bus stands.
Between the north and south sides of the station is a passenger concourse.
The dome which covers the passenger concourse is made of a metallic framework, covered in copper.
In 2006, construction began to replace the three existing passenger concourses.
The passenger concourse is on an intermediate level between the upper and lower platforms.
In December 2010, the airport began building a new passenger concourse that will cost $45 million.
We stopped in the stairwell of a grubby little flight leading up to the main passenger concourse.