For your protection, your login session will expire in 0:00, do you wish extend your session or logout?
FMCSA - Federal Motor Carrier Safety Adminstration

CSA - Compliance, Safety, Accountability

Working Together for Safety.


SMS - Safety Measurement System SMS - Safety Measurement System

Measure vs. Percentile

Carrier violations or crashes are weighted by time and severity to produce a measure for that carrier in each BASIC. The measure is then used to assign that carrier to a percentile rank containing carriers’ information in similar safety event groups. Expand for more information.

Carrier violations or crashes are weighted by time and severity to produce a measure for that carrier in each BASIC. The measure only considers individual performance based on 24 months of data, with a measure of 0 indicating best performance. The measure is then used to assign that carrier to a percentile rank containing carriers’ information in similar safety event groups. The graph below shows how the carrier’s measure correlates with its percentile rank over a selected period of time.

  • 16
  • 12
  • 8
  • 4
  • 0
  • 0
  • 10
  • 20
  • 30
  • 40
  • 50
  • 60
  • 70
  • 80
  • 90
  • 98
Measure Percentile
0 0
0.19 1
0.31 2
0.45 3
0.57 4
0.68 5
0.79 6
0.89 7
0.98 8
1.06 9
1.14 10
1.22 11
1.29 12
1.37 13
1.44 14
1.51 15
1.58 16
1.64 17
1.70 18
1.76 19
1.82 20
1.89 21
1.95 22
2.01 23
2.06 24
2.13 25
2.20 26
2.25 27
2.31 28
2.38 29
2.43 30
2.50 31
2.56 32
2.61 33
2.67 34
2.73 35
2.79 36
2.85 37
2.92 38
2.98 39
3.05 40
3.10 41
3.17 42
3.24 43
3.29 44
3.36 45
3.42 46
3.49 47
3.56 48
3.63 49
3.70 50
3.76 51
3.83 52
3.91 53
3.98 54
4.04 55
4.11 56
4.17 57
4.25 58
4.32 59
4.40 60
4.49 61
4.58 62
4.68 63
4.76 64
4.85 65
4.92 66
5.01 67
5.10 68
5.18 69
5.28 70
5.37 71
5.47 72
5.57 73
5.67 74
5.78 75
5.90 76
6.01 77
6.15 78
6.28 79
6.41 80
6.56 81
6.70 82
6.87 83
7.05 84
7.23 85
7.44 86
7.64 87
7.87 88
8.11 89
8.36 90
8.63 91
8.90 92
9.26 93
9.63 94
10.10 95
10.84 96
11.53 97
12.52 98
14.15 99
26.47 100