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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
0.56 1
0.61 2
0.67 3
0.70 4
0.75 5
0.85 6
0.92 7
0.95 8
1.00 9
1.12 10
1.15 11
1.17 12
1.21 13
1.23 14
1.25 15
1.30 16
1.34 17
1.37 18
1.42 19
1.45 20
1.51 21
1.55 22
1.57 23
1.60 24
1.66 25
1.70 26
1.74 27
1.75 28
1.76 29
1.80 30
1.82 31
1.83 32
1.86 33
1.89 34
1.92 35
1.94 36
1.96 37
2.00 38
2.02 39
2.05 40
2.09 41
2.12 42
2.14 43
2.16 44
2.18 45
2.22 46
2.25 47
2.28 48
2.29 49
2.32 50
2.36 51
2.37 52
2.41 53
2.43 54
2.48 55
2.48 56
2.50 57
2.53 58
2.55 59
2.57 60
2.58 61
2.60 62
2.62 63
2.64 64
2.65 65
2.67 66
2.70 67
2.71 68
2.78 69
2.82 70
2.85 71
2.89 72
2.98 73
3.04 74
3.08 75
3.16 76
3.17 77
3.20 78
3.23 79
3.34 80
3.38 81
3.43 82
3.49 83
3.64 84
3.77 85
3.87 86
4.02 87
4.09 88
4.18 89
4.26 90
4.29 91
4.49 92
4.62 93
4.88 94
5.07 95
5.27 96
5.62 97
6.21 98
6.88 99
8.77 100