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FMCSA - Federal Motor Carrier Safety Adminstration

CSA - Compliance, Safety, Accountability

Working Together for Safety.


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
  • 98
Measure Percentile
0 0
0.07 1
0.07 2
0.08 3
0.09 4
0.09 5
0.10 6
0.10 7
0.11 8
0.11 9
0.13 10
0.13 11
0.14 12
0.15 13
0.15 14
0.17 15
0.17 16
0.18 17
0.19 18
0.20 19
0.21 20
0.22 21
0.23 22
0.25 23
0.26 24
0.27 25
0.29 26
0.30 27
0.31 28
0.34 29
0.36 30
0.38 31
0.40 32
0.43 33
0.45 34
0.50 35
0.51 36
0.54 37
0.57 38
0.59 39
0.62 40
0.64 41
0.67 42
0.69 43
0.72 44
0.73 45
0.77 46
0.79 47
0.82 48
0.84 49
0.86 50
0.90 51
0.91 52
0.93 53
1.01 54
1.02 55
1.03 56
1.08 57
1.10 58
1.11 59
1.14 60
1.18 61
1.23 62
1.26 63
1.26 64
1.32 65
1.36 66
1.41 67
1.43 68
1.43 69
1.51 70
1.56 71
1.61 72
1.67 73
1.68 74
1.72 75
1.78 76
1.83 77
1.88 78
2.01 79
2.03 80
2.05 81
2.14 82
2.21 83
2.26 84
2.36 85
2.50 86
2.52 87
2.64 88
2.75 89
2.86 90
3.02 91
3.17 92
3.34 93
3.54 94
3.76 95
4.04 96
4.46 97
5.04 98
6.03 99
19.10 100