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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.

  • 12
  • 9
  • 6
  • 3
  • 0
  • 0
  • 10
  • 20
  • 30
  • 40
  • 50
  • 60
  • 70
  • 80
  • 90
  • 100
Measure Percentile
0 0
0.52 1
0.60 2
0.66 3
0.74 4
0.77 5
0.88 6
0.94 7
0.96 8
1.02 9
1.08 10
1.11 11
1.19 12
1.21 13
1.25 14
1.31 15
1.35 16
1.37 17
1.41 18
1.44 19
1.47 20
1.54 21
1.55 22
1.56 23
1.63 24
1.65 25
1.68 26
1.69 27
1.72 28
1.79 29
1.83 30
1.84 31
1.86 32
1.89 33
1.91 34
1.93 35
1.95 36
1.97 37
2.01 38
2.04 39
2.08 40
2.11 41
2.13 42
2.16 43
2.18 44
2.20 45
2.21 46
2.23 47
2.26 48
2.28 49
2.33 50
2.36 51
2.39 52
2.42 53
2.44 54
2.46 55
2.49 56
2.52 57
2.52 58
2.55 59
2.56 60
2.57 61
2.58 62
2.61 63
2.64 64
2.66 65
2.69 66
2.71 67
2.74 68
2.77 69
2.81 70
2.88 71
2.92 72
2.97 73
3.00 74
3.10 75
3.14 76
3.18 77
3.22 78
3.24 79
3.30 80
3.37 81
3.47 82
3.55 83
3.63 84
3.70 85
3.85 86
3.96 87
4.06 88
4.15 89
4.23 90
4.28 91
4.65 92
4.80 93
5.13 94
5.33 95
5.41 96
5.87 97
6.30 98
6.78 99
8.29 100