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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.

  • 48
  • 36
  • 24
  • 12
  • 0
  • 0
  • 10
  • 20
  • 30
  • 40
  • 50
  • 60
  • 70
  • 80
  • 90
  • 98
Measure Percentile
0 0
0.37 1
0.54 2
0.68 3
0.81 4
0.91 5
1.02 6
1.10 7
1.18 8
1.27 9
1.35 10
1.44 11
1.53 12
1.61 13
1.69 14
1.77 15
1.86 16
1.92 17
2.00 18
2.07 19
2.14 20
2.22 21
2.28 22
2.35 23
2.43 24
2.50 25
2.57 26
2.65 27
2.74 28
2.83 29
2.92 30
3.00 31
3.11 32
3.19 33
3.28 34
3.38 35
3.48 36
3.57 37
3.67 38
3.76 39
3.86 40
3.97 41
4.06 42
4.17 43
4.27 44
4.39 45
4.50 46
4.63 47
4.73 48
4.82 49
4.95 50
5.07 51
5.20 52
5.34 53
5.46 54
5.60 55
5.75 56
5.88 57
6.00 58
6.20 59
6.36 60
6.51 61
6.69 62
6.87 63
7.02 64
7.21 65
7.40 66
7.63 67
7.85 68
8.07 69
8.32 70
8.59 71
8.84 72
9.13 73
9.39 74
9.67 75
10.00 76
10.39 77
10.78 78
11.14 79
11.50 80
11.98 81
12.40 82
12.95 83
13.38 84
14.00 85
14.50 86
15.20 87
16.03 88
16.89 89
17.99 90
19.03 91
20.37 92
22.00 93
23.87 94
25.58 95
28.55 96
32.20 97
37.62 98
46.98 99
123.00 100