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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
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  • 50
  • 60
  • 70
  • 80
  • 90
  • 100
Measure Percentile
0 0
0.00 1
0.01 2
0.01 3
0.01 4
0.02 5
0.02 6
0.02 7
0.03 8
0.03 9
0.03 10
0.04 11
0.04 12
0.04 13
0.04 14
0.05 15
0.05 16
0.05 17
0.05 18
0.06 19
0.06 20
0.06 21
0.06 22
0.07 23
0.07 24
0.07 25
0.07 26
0.07 27
0.07 28
0.08 29
0.08 30
0.08 31
0.08 32
0.09 33
0.09 34
0.09 35
0.10 36
0.10 37
0.10 38
0.11 39
0.11 40
0.11 41
0.11 42
0.12 43
0.12 44
0.12 45
0.13 46
0.13 47
0.13 48
0.14 49
0.14 50
0.14 51
0.15 52
0.15 53
0.16 54
0.16 55
0.17 56
0.17 57
0.18 58
0.18 59
0.19 60
0.19 61
0.20 62
0.21 63
0.22 64
0.22 65
0.23 66
0.24 67
0.25 68
0.26 69
0.30 70
0.32 71
0.33 72
0.37 73
0.39 74
0.40 75
0.44 76
0.48 77
0.49 78
0.52 79
0.57 80
0.59 81
0.62 82
0.65 83
0.68 84
0.70 85
0.75 86
0.78 87
0.83 88
0.86 89
0.88 90
0.94 91
0.99 92
1.09 93
1.14 94
1.20 95
1.27 96
1.39 97
1.50 98
1.76 99
2.70 100