Table 2: The relationship among different classes (types) of turnover.

Hierarchy typeLocal routeFeeder routeMass route

Local route 𝑍 1 1 𝑍 1
Feeder route 𝑍 2 1 𝑍 2 2 𝑍 2
Mass route 𝑍 3 1 𝑍 3 2 𝑍 3 3 𝑍 3
𝑍 𝑍 1 𝑍 𝑍 2 𝑍 𝑍 3 𝑍 t o t a l