Establishment of Track Quality Index Standard Recommendations for Beijing Metro

Table 6

The 85th percentiles of track quality quantities over each track.

#	Track	Surface	Alignment	Gauge	Cross level	Twist	TQI
1	10# right	2.57 2	2.52 2	1.97	2.06	1.80	15.99
2	10# left	2.42 2	2.40 2	1.85	1.99	1.47	14.96
3	East 13# upgoing	2.46 2	1.79 2	1.75	2.03	1.86	14.13
4	East 13# downgoing	2.40 2	1.92 2	1.72	1.81	1.53	13.69
5	West 13# upgoing	2.52 2	2.28 2	1.97	2.29	1.75	15.62
6	West 13# downgoing	2.39 2	2.01 2	2.04	2.13	1.67	14.63
7	1# upgoing	2.77 2	2.57 2	2.02	2.38	1.91	16.99
8	1# downgoing	3.12 2	2.47 2	1.97	2.24	2.04	17.44
9	2# inner circle	2.57 2	2.37 2	2.30	3.24	2.08	17.50
10	2# outer circle	2.28 2	2.66 2	2.43	3.08	1.81	17.20
11	5# upgoing	2.19 2	2.55 2	1.76	1.72	1.47	14.41
12	5# downgoing	2.38 2	2.70 2	1.53	1.86	1.52	15.06
13	Ba-Tong upgoing	2.64 2	1.99 2	1.62	1.72	1.23	13.82
14	Ba-Tong downgoing	2.77 2	2.30 2	1.63	1.69	1.42	14.86