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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.

  • 20
  • 15
  • 10
  • 5
  • 0
  • 0
  • 10
  • 20
  • 30
  • 40
  • 50
  • 60
  • 70
  • 80
  • 90
  • 98
Measure Percentile
0 0
0.20 1
0.35 2
0.46 3
0.57 4
0.67 5
0.77 6
0.88 7
0.96 8
1.05 9
1.15 10
1.24 11
1.34 12
1.42 13
1.51 14
1.60 15
1.68 16
1.76 17
1.84 18
1.92 19
2.01 20
2.09 21
2.17 22
2.26 23
2.35 24
2.42 25
2.50 26
2.58 27
2.67 28
2.75 29
2.83 30
2.90 31
2.97 32
3.06 33
3.13 34
3.21 35
3.28 36
3.35 37
3.44 38
3.52 39
3.60 40
3.69 41
3.77 42
3.85 43
3.94 44
4.03 45
4.11 46
4.20 47
4.29 48
4.38 49
4.47 50
4.55 51
4.64 52
4.73 53
4.83 54
4.92 55
5.02 56
5.11 57
5.21 58
5.31 59
5.41 60
5.52 61
5.62 62
5.73 63
5.84 64
5.94 65
6.06 66
6.19 67
6.30 68
6.44 69
6.56 70
6.69 71
6.83 72
6.96 73
7.08 74
7.24 75
7.39 76
7.55 77
7.69 78
7.87 79
8.05 80
8.22 81
8.41 82
8.61 83
8.83 84
9.06 85
9.32 86
9.59 87
9.84 88
10.16 89
10.48 90
10.84 91
11.26 92
11.69 93
12.23 94
12.83 95
13.58 96
14.52 97
15.66 98
17.67 99
27.79 100