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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
0.02 1
0.02 2
0.03 3
0.05 4
0.06 5
0.07 6
0.08 7
0.10 8
0.11 9
0.12 10
0.13 11
0.15 12
0.16 13
0.17 14
0.18 15
0.20 16
0.21 17
0.23 18
0.24 19
0.26 20
0.27 21
0.29 22
0.30 23
0.32 24
0.33 25
0.35 26
0.36 27
0.38 28
0.39 29
0.41 30
0.42 31
0.44 32
0.46 33
0.47 34
0.49 35
0.51 36
0.53 37
0.54 38
0.56 39
0.58 40
0.60 41
0.62 42
0.64 43
0.65 44
0.67 45
0.69 46
0.71 47
0.73 48
0.76 49
0.78 50
0.80 51
0.83 52
0.85 53
0.87 54
0.89 55
0.92 56
0.94 57
0.96 58
0.98 59
1.01 60
1.04 61
1.07 62
1.09 63
1.12 64
1.15 65
1.18 66
1.21 67
1.23 68
1.27 69
1.30 70
1.33 71
1.36 72
1.40 73
1.43 74
1.46 75
1.50 76
1.55 77
1.59 78
1.63 79
1.68 80
1.72 81
1.77 82
1.82 83
1.88 84
1.94 85
2.00 86
2.06 87
2.13 88
2.20 89
2.29 90
2.38 91
2.48 92
2.58 93
2.70 94
2.86 95
3.03 96
3.30 97
3.61 98
4.12 99
8.48 100