Establishment of Track Quality Index Standard Recommendations for Beijing Metro

Table 7

The 90th percentiles of track quality quantities over each track.

#	Track	Surface	Alignment	Gauge	Cross level	Twist	TQI
1	10# right	2.72 2	2.71 2	2.38	2.31	1.96	17.53
2	10# left	2.64 2	2.62 2	2.31	2.15	1.62	16.58
3	East 13# upgoing	2.57 2	1.91 2	2.07	2.14	2.01	15.19
4	East 13# downgoing	2.54 2	2.07 2	2.03	1.96	1.69	14.89
5	West 13# upgoing	2.66 2	2.40 2	2.35	2.44	1.92	16.83
6	West 13# downgoing	2.53 2	2.24 2	2.31	2.48	2.00	16.32
7	1# upgoing	2.94 2	2.82 2	2.29	2.88	2.11	18.80
8	1# downgoing	3.36 2	2.59 2	2.28	2.74	2.25	19.16
9	2# inner circle	2.66 2	2.55 2	2.68	3.46	2.24	18.80
10	2# outer circle	2.38 2	2.79 2	2.69	3.42	1.89	18.33
11	5# upgoing	2.31 2	2.73 2	2.16	1.95	1.59	15.79
12	5# downgoing	2.51 2	2.92 2	1.75	2.13	1.65	16.38
13	Ba-Tong upgoing	2.79 2	2.48 2	1.96	1.87	1.32	15.68
14	Ba-Tong downgoing	2.89 2	2.45 2	1.91	1.88	1.52	16.00