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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
0.08 1
0.09 2
0.11 3
0.13 4
0.15 5
0.17 6
0.18 7
0.20 8
0.21 9
0.23 10
0.26 11
0.28 12
0.30 13
0.34 14
0.34 15
0.38 16
0.41 17
0.43 18
0.48 19
0.51 20
0.55 21
0.59 22
0.63 23
0.67 24
0.70 25
0.72 26
0.77 27
0.80 28
0.84 29
0.88 30
0.89 31
0.93 32
1.01 33
1.02 34
1.03 35
1.07 36
1.11 37
1.15 38
1.17 39
1.21 40
1.25 41
1.28 42
1.33 43
1.37 44
1.40 45
1.42 46
1.46 47
1.51 48
1.55 49
1.60 50
1.64 51
1.67 52
1.70 53
1.75 54
1.76 55
1.80 56
1.85 57
1.91 58
2.00 59
2.02 60
2.03 61
2.09 62
2.15 63
2.21 64
2.26 65
2.34 66
2.34 67
2.39 68
2.46 69
2.52 70
2.60 71
2.67 72
2.72 73
2.81 74
2.88 75
3.01 76
3.03 77
3.10 78
3.21 79
3.34 80
3.43 81
3.51 82
3.60 83
3.75 84
3.86 85
4.02 86
4.17 87
4.30 88
4.50 89
4.67 90
4.84 91
5.05 92
5.34 93
5.63 94
6.02 95
6.44 96
7.03 97
7.76 98
9.34 99
21.57 100