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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
0.06 1
0.07 2
0.07 3
0.08 4
0.09 5
0.09 6
0.10 7
0.10 8
0.11 9
0.12 10
0.13 11
0.13 12
0.14 13
0.15 14
0.16 15
0.17 16
0.17 17
0.18 18
0.19 19
0.20 20
0.21 21
0.22 22
0.23 23
0.25 24
0.26 25
0.27 26
0.28 27
0.30 28
0.31 29
0.34 30
0.34 31
0.37 32
0.38 33
0.41 34
0.43 35
0.46 36
0.50 37
0.52 38
0.55 39
0.57 40
0.59 41
0.62 42
0.64 43
0.67 44
0.70 45
0.72 46
0.75 47
0.78 48
0.80 49
0.84 50
0.85 51
0.88 52
0.91 53
0.92 54
1.00 55
1.01 56
1.03 57
1.06 58
1.10 59
1.11 60
1.15 61
1.19 62
1.23 63
1.26 64
1.28 65
1.34 66
1.38 67
1.42 68
1.43 69
1.47 70
1.53 71
1.57 72
1.63 73
1.67 74
1.70 75
1.77 76
1.82 77
1.88 78
2.00 79
2.02 80
2.04 81
2.14 82
2.20 83
2.23 84
2.31 85
2.42 86
2.51 87
2.58 88
2.73 89
2.82 90
3.01 91
3.04 92
3.30 93
3.38 94
3.68 95
4.00 96
4.34 97
5.00 98
6.01 99
14.79 100