Establishment of Track Quality Index Standard Recommendations for Beijing Metro

Table 4

The 75th percentiles of track quality quantities over each track.

#	Track	Surface	Alignment	Gauge	Cross level	Twist	TQI
1	10# right	2.31 2	2.23 2	1.41	1.88	1.55	13.92
2	10# left	2.18 2	2.14 2	1.28	1.72	1.32	12.95
3	East 13# upgoing	2.23 2	1.59 2	1.25	1.83	1.69	12.40
4	East 13# downgoing	2.14 2	1.67 2	1.18	1.53	1.36	11.70
5	West 13# upgoing	2.31 2	2.02 2	1.68	1.88	1.50	13.72
6	West 13# downgoing	2.16 2	1.75 2	1.51	1.92	1.44	12.69
7	1# upgoing	2.51 2	2.32 2	1.70	1.83	1.65	14.83
8	1# downgoing	2.75 2	2.22 2	1.65	1.86	1.78	15.23
9	2# inner circle	2.38 2	2.16 2	1.78	2.81	1.88	15.55
10	2# outer circle	2.11 2	2.39 2	1.80	2.74	1.72	15.25
11	5# upgoing	1.95 2	2.26 2	1.30	1.50	1.34	12.55
12	5# downgoing	2.13 2	2.38 2	1.22	1.61	1.34	13.19
13	Ba-Tong upgoing	2.39 2	1.78 2	1.33	1.44	1.14	12.24
14	Ba-Tong downgoing	2.50 2	1.98 2	1.35	1.43	1.25	12.99