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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.

  • 16
  • 12
  • 8
  • 4
  • 0
  • 0
  • 10
  • 20
  • 30
  • 40
  • 50
  • 60
  • 70
  • 80
  • 90
  • 100
Measure Percentile
0 0
0.62 1
0.66 2
0.75 3
0.84 4
0.89 5
0.92 6
0.96 7
1.01 8
1.05 9
1.12 10
1.14 11
1.18 12
1.23 13
1.26 14
1.28 15
1.30 16
1.34 17
1.37 18
1.39 19
1.42 20
1.46 21
1.51 22
1.56 23
1.57 24
1.60 25
1.62 26
1.64 27
1.66 28
1.71 29
1.73 30
1.76 31
1.76 32
1.79 33
1.84 34
1.87 35
1.91 36
1.93 37
1.94 38
1.97 39
1.99 40
2.01 41
2.05 42
2.05 43
2.06 44
2.09 45
2.11 46
2.15 47
2.19 48
2.20 49
2.22 50
2.23 51
2.25 52
2.27 53
2.30 54
2.35 55
2.38 56
2.39 57
2.41 58
2.46 59
2.53 60
2.56 61
2.59 62
2.60 63
2.61 64
2.64 65
2.72 66
2.78 67
2.83 68
2.86 69
2.87 70
2.90 71
2.92 72
2.99 73
3.08 74
3.12 75
3.14 76
3.19 77
3.26 78
3.37 79
3.44 80
3.47 81
3.49 82
3.56 83
3.65 84
3.85 85
4.01 86
4.13 87
4.22 88
4.40 89
4.61 90
4.71 91
4.95 92
5.23 93
5.41 94
5.60 95
6.14 96
6.87 97
8.15 98
10.62 99
33.72 100