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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.

  • 4
  • 3
  • 2
  • 1
  • 0
  • 0
  • 10
  • 20
  • 30
  • 40
  • 50
  • 60
  • 70
  • 80
  • 90
  • 98
Measure Percentile
0 0
0.01 1
0.02 2
0.02 3
0.03 4
0.03 5
0.04 6
0.05 7
0.05 8
0.06 9
0.06 10
0.07 11
0.08 12
0.09 13
0.09 14
0.10 15
0.11 16
0.12 17
0.13 18
0.13 19
0.14 20
0.15 21
0.16 22
0.17 23
0.18 24
0.18 25
0.19 26
0.20 27
0.21 28
0.22 29
0.23 30
0.24 31
0.25 32
0.26 33
0.27 34
0.28 35
0.29 36
0.30 37
0.31 38
0.33 39
0.34 40
0.35 41
0.36 42
0.37 43
0.38 44
0.40 45
0.41 46
0.42 47
0.43 48
0.45 49
0.46 50
0.48 51
0.49 52
0.50 53
0.52 54
0.53 55
0.55 56
0.57 57
0.58 58
0.60 59
0.61 60
0.63 61
0.65 62
0.67 63
0.69 64
0.71 65
0.73 66
0.75 67
0.78 68
0.80 69
0.82 70
0.85 71
0.87 72
0.90 73
0.93 74
0.96 75
0.99 76
1.02 77
1.06 78
1.09 79
1.13 80
1.16 81
1.21 82
1.24 83
1.29 84
1.33 85
1.39 86
1.44 87
1.50 88
1.56 89
1.63 90
1.70 91
1.80 92
1.89 93
2.01 94
2.15 95
2.33 96
2.55 97
2.89 98
3.45 99
7.37 100