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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
  • 3
  • 2
  • 1
  • 0
  • 0
  • 10
  • 20
  • 30
  • 40
  • 50
  • 60
  • 70
  • 80
  • 90
  • 100
Measure Percentile
0 0
0.01 1
0.01 2
0.01 3
0.02 4
0.02 5
0.03 6
0.03 7
0.04 8
0.04 9
0.05 10
0.06 11
0.06 12
0.07 13
0.07 14
0.08 15
0.09 16
0.09 17
0.10 18
0.11 19
0.12 20
0.12 21
0.13 22
0.14 23
0.14 24
0.15 25
0.16 26
0.17 27
0.18 28
0.19 29
0.20 30
0.21 31
0.22 32
0.23 33
0.24 34
0.25 35
0.27 36
0.28 37
0.29 38
0.31 39
0.32 40
0.34 41
0.35 42
0.36 43
0.38 44
0.39 45
0.41 46
0.42 47
0.44 48
0.45 49
0.48 50
0.49 51
0.51 52
0.53 53
0.55 54
0.57 55
0.60 56
0.61 57
0.63 58
0.65 59
0.67 60
0.70 61
0.72 62
0.73 63
0.75 64
0.77 65
0.79 66
0.81 67
0.84 68
0.86 69
0.89 70
0.91 71
0.95 72
0.98 73
1.00 74
1.03 75
1.05 76
1.08 77
1.11 78
1.14 79
1.17 80
1.20 81
1.23 82
1.26 83
1.29 84
1.33 85
1.37 86
1.40 87
1.44 88
1.49 89
1.54 90
1.59 91
1.65 92
1.72 93
1.81 94
1.91 95
2.02 96
2.18 97
2.37 98
2.64 99
4.72 100