Establishment of Track Quality Index Standard Recommendations for Beijing Metro

Table 5

The 80th percentiles of track quality quantities over each track.

#	Track	Surface	Alignment	Gauge	Cross level	Twist	TQI
1	10# right	2.45 2	2.37 2	1.63	1.93	1.65	14.83
2	10# left	2.30 2	2.28 2	1.53	1.85	1.38	13.92
3	East 13# upgoing	2.33 2	1.68 2	1.40	1.94	1.78	13.15
4	East 13# downgoing	2.25 2	1.79 2	1.47	1.65	1.42	12.64
5	West 13# upgoing	2.41 2	2.17 2	1.78	2.13	1.62	14.68
6	West 13# downgoing	2.28 2	1.88 2	1.76	2.02	1.55	13.65
7	1# upgoing	2.64 2	2.44 2	1.82	1.96	1.77	15.71
8	1# downgoing	2.91 2	2.33 2	1.78	1.95	1.89	16.11
9	2# inner circle	2.47 2	2.26 2	2.00	3.00	1.95	16.42
10	2# outer circle	2.19 2	2.52 2	2.19	2.89	1.76	16.26
11	5# upgoing	2.06 2	2.40 2	1.45	1.59	1.38	13.33
12	5# downgoing	2.25 2	2.53 2	1.30	1.70	1.41	13.97
13	Ba-Tong upgoing	2.51 2	1.88 2	1.46	1.62	1.18	13.04
14	Ba-Tong downgoing	2.61 2	2.12 2	1.46	1.55	1.32	13.80