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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
0.04 1
0.04 2
0.05 3
0.06 4
0.07 5
0.08 6
0.10 7
0.11 8
0.13 9
0.15 10
0.17 11
0.19 12
0.21 13
0.23 14
0.25 15
0.27 16
0.28 17
0.30 18
0.32 19
0.34 20
0.35 21
0.37 22
0.39 23
0.40 24
0.42 25
0.44 26
0.45 27
0.47 28
0.50 29
0.51 30
0.53 31
0.55 32
0.57 33
0.59 34
0.61 35
0.63 36
0.65 37
0.67 38
0.69 39
0.71 40
0.73 41
0.75 42
0.77 43
0.80 44
0.82 45
0.84 46
0.87 47
0.89 48
0.91 49
0.94 50
0.96 51
1.00 52
1.02 53
1.04 54
1.07 55
1.10 56
1.13 57
1.16 58
1.19 59
1.22 60
1.25 61
1.28 62
1.31 63
1.34 64
1.38 65
1.41 66
1.45 67
1.50 68
1.54 69
1.58 70
1.63 71
1.67 72
1.72 73
1.76 74
1.82 75
1.88 76
1.92 77
1.97 78
2.04 79
2.09 80
2.16 81
2.22 82
2.29 83
2.36 84
2.45 85
2.53 86
2.62 87
2.72 88
2.82 89
2.92 90
3.05 91
3.19 92
3.36 93
3.55 94
3.75 95
4.02 96
4.36 97
4.78 98
5.57 99
14.67 100