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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
0.02 3
0.02 4
0.02 5
0.03 6
0.03 7
0.04 8
0.04 9
0.05 10
0.05 11
0.06 12
0.06 13
0.07 14
0.07 15
0.08 16
0.09 17
0.09 18
0.10 19
0.11 20
0.11 21
0.12 22
0.12 23
0.13 24
0.14 25
0.14 26
0.15 27
0.16 28
0.17 29
0.17 30
0.18 31
0.19 32
0.19 33
0.20 34
0.21 35
0.22 36
0.23 37
0.24 38
0.25 39
0.27 40
0.28 41
0.29 42
0.30 43
0.31 44
0.33 45
0.34 46
0.36 47
0.37 48
0.38 49
0.40 50
0.41 51
0.43 52
0.44 53
0.46 54
0.48 55
0.49 56
0.50 57
0.52 58
0.53 59
0.55 60
0.57 61
0.59 62
0.60 63
0.63 64
0.64 65
0.66 66
0.68 67
0.70 68
0.72 69
0.74 70
0.75 71
0.78 72
0.80 73
0.83 74
0.84 75
0.87 76
0.90 77
0.92 78
0.96 79
0.99 80
1.02 81
1.05 82
1.08 83
1.11 84
1.15 85
1.18 86
1.22 87
1.26 88
1.31 89
1.35 90
1.40 91
1.45 92
1.51 93
1.59 94
1.71 95
1.83 96
1.95 97
2.14 98
2.42 99
4.18 100