Would love to understand some of the underlying design and social factors that go into making these types of concourses a success. We have a similar abet much s

Would love to understand some of the underlying design and social factors that go into making these types of concourses a success. We have a similar abet much smaller underground mall in Philadelphia running through3 major transit stops in the downtown area, connecting multiple buildings and plazas, yet the area remains disheveled and relatively unused and even sometimes dangerous.