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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.

  • 8
  • 6
  • 4
  • 2
  • 0
  • 0
  • 10
  • 20
  • 30
  • 40
  • 50
  • 60
  • 70
  • 80
  • 90
  • 98
Measure Percentile
0 0
0.03 1
0.04 2
0.04 3
0.04 4
0.05 5
0.05 6
0.06 7
0.06 8
0.07 9
0.08 10
0.08 11
0.09 12
0.10 13
0.10 14
0.11 15
0.12 16
0.13 17
0.14 18
0.15 19
0.16 20
0.17 21
0.19 22
0.20 23
0.22 24
0.24 25
0.25 26
0.27 27
0.28 28
0.29 29
0.30 30
0.32 31
0.32 32
0.34 33
0.35 34
0.36 35
0.37 36
0.39 37
0.40 38
0.42 39
0.42 40
0.44 41
0.45 42
0.46 43
0.48 44
0.48 45
0.50 46
0.52 47
0.53 48
0.54 49
0.56 50
0.57 51
0.59 52
0.61 53
0.63 54
0.64 55
0.65 56
0.67 57
0.69 58
0.72 59
0.73 60
0.75 61
0.77 62
0.79 63
0.82 64
0.84 65
0.86 66
0.88 67
0.91 68
0.92 69
0.95 70
0.98 71
1.01 72
1.03 73
1.05 74
1.08 75
1.11 76
1.14 77
1.17 78
1.20 79
1.24 80
1.26 81
1.31 82
1.35 83
1.39 84
1.43 85
1.48 86
1.54 87
1.59 88
1.67 89
1.75 90
1.85 91
1.94 92
2.06 93
2.20 94
2.37 95
2.60 96
2.88 97
3.36 98
4.24 99
14.68 100