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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.

  • 8
  • 6
  • 4
  • 2
  • 0
  • 0
  • 10
  • 20
  • 30
  • 40
  • 50
  • 60
  • 70
  • 80
  • 90
  • 100
Measure Percentile
0 0
0.03 1
0.04 2
0.04 3
0.04 4
0.05 5
0.05 6
0.05 7
0.06 8
0.06 9
0.07 10
0.07 11
0.08 12
0.09 13
0.09 14
0.10 15
0.10 16
0.11 17
0.12 18
0.13 19
0.13 20
0.14 21
0.15 22
0.16 23
0.17 24
0.18 25
0.20 26
0.21 27
0.22 28
0.24 29
0.25 30
0.26 31
0.27 32
0.28 33
0.29 34
0.31 35
0.32 36
0.33 37
0.34 38
0.35 39
0.36 40
0.37 41
0.39 42
0.39 43
0.40 44
0.42 45
0.42 46
0.44 47
0.45 48
0.46 49
0.48 50
0.48 51
0.51 52
0.52 53
0.53 54
0.54 55
0.56 56
0.58 57
0.59 58
0.61 59
0.63 60
0.64 61
0.67 62
0.67 63
0.70 64
0.72 65
0.74 66
0.76 67
0.78 68
0.80 69
0.82 70
0.84 71
0.87 72
0.89 73
0.91 74
0.94 75
0.96 76
1.00 77
1.02 78
1.04 79
1.07 80
1.11 81
1.14 82
1.17 83
1.21 84
1.25 85
1.29 86
1.32 87
1.37 88
1.43 89
1.48 90
1.55 91
1.64 92
1.72 93
1.83 94
1.96 95
2.16 96
2.41 97
2.73 98
3.39 99
11.50 100