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FMCSA - Federal Motor Carrier Safety Adminstration

CSA - Compliance, Safety, Accountability

Get Road Smart.


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
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  • 2
  • 1
  • 0
  • 0
  • 10
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  • 40
  • 50
  • 60
  • 70
  • 80
  • 90
  • 100
Measure Percentile
0 0
0.01 1
0.01 2
0.02 3
0.02 4
0.02 5
0.02 6
0.03 7
0.03 8
0.03 9
0.04 10
0.04 11
0.04 12
0.05 13
0.05 14
0.06 15
0.06 16
0.06 17
0.07 18
0.07 19
0.08 20
0.08 21
0.08 22
0.09 23
0.09 24
0.10 25
0.10 26
0.11 27
0.11 28
0.12 29
0.12 30
0.13 31
0.13 32
0.14 33
0.14 34
0.15 35
0.15 36
0.16 37
0.16 38
0.17 39
0.18 40
0.18 41
0.19 42
0.19 43
0.20 44
0.20 45
0.21 46
0.21 47
0.22 48
0.22 49
0.23 50
0.24 51
0.24 52
0.25 53
0.25 54
0.26 55
0.27 56
0.27 57
0.28 58
0.29 59
0.29 60
0.30 61
0.31 62
0.32 63
0.32 64
0.34 65
0.34 66
0.36 67
0.37 68
0.38 69
0.39 70
0.40 71
0.41 72
0.42 73
0.43 74
0.44 75
0.46 76
0.47 77
0.49 78
0.50 79
0.51 80
0.53 81
0.55 82
0.56 83
0.59 84
0.61 85
0.63 86
0.66 87
0.68 88
0.71 89
0.74 90
0.77 91
0.82 92
0.86 93
0.93 94
1.01 95
1.10 96
1.22 97
1.40 98
1.74 99
7.67 100