Determining the Level of Service Scale of Public Transport System considering the Distribution of Service Quality

Table 4

Subway line LOS.

Line LOS	Threshold	Description
I	0 ≤ C < −7.31 A + 1.28; and 0 ≤ A < 0.175	Seats of all trains are not fully utilized; passengers feel very comfortable.
II	−7.31 A + 1.28 ≤ C < −2.13 A + 1.28; and 0 ≤ A < 0.6	Seats of all trains are fully utilized and some passengers have to stand; passengers feel comfortable.
III	−2.13 A + 1.28 ≤ C < −1.6 A + 1.28; and 0 ≤ A < 0.8	The overall capacity of all trains is utilized well; some trains start to be crowded.
IV	−1.6 A + 1.28 ≤ C; and 0 ≤ A	There are crowded and overcrowded trains; passengers feel the worst.