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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
0.02 1
0.02 2
0.03 3
0.04 4
0.05 5
0.06 6
0.07 7
0.09 8
0.10 9
0.11 10
0.12 11
0.13 12
0.14 13
0.15 14
0.16 15
0.17 16
0.18 17
0.20 18
0.21 19
0.22 20
0.23 21
0.24 22
0.26 23
0.27 24
0.29 25
0.30 26
0.31 27
0.32 28
0.34 29
0.35 30
0.37 31
0.38 32
0.39 33
0.41 34
0.42 35
0.44 36
0.46 37
0.47 38
0.49 39
0.51 40
0.52 41
0.54 42
0.55 43
0.57 44
0.59 45
0.61 46
0.62 47
0.64 48
0.66 49
0.68 50
0.70 51
0.71 52
0.73 53
0.75 54
0.77 55
0.79 56
0.82 57
0.84 58
0.86 59
0.88 60
0.91 61
0.93 62
0.95 63
0.98 64
1.01 65
1.03 66
1.06 67
1.09 68
1.11 69
1.14 70
1.17 71
1.20 72
1.24 73
1.27 74
1.31 75
1.34 76
1.38 77
1.41 78
1.46 79
1.49 80
1.54 81
1.58 82
1.63 83
1.68 84
1.74 85
1.80 86
1.86 87
1.93 88
2.00 89
2.08 90
2.17 91
2.27 92
2.38 93
2.50 94
2.65 95
2.82 96
3.05 97
3.36 98
3.93 99
8.34 100