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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
0.03 1
0.04 2
0.04 3
0.04 4
0.05 5
0.05 6
0.05 7
0.06 8
0.06 9
0.07 10
0.07 11
0.08 12
0.09 13
0.09 14
0.10 15
0.10 16
0.11 17
0.12 18
0.13 19
0.13 20
0.14 21
0.15 22
0.16 23
0.17 24
0.18 25
0.20 26
0.21 27
0.22 28
0.24 29
0.25 30
0.27 31
0.28 32
0.29 33
0.30 34
0.31 35
0.32 36
0.34 37
0.35 38
0.36 39
0.37 40
0.38 41
0.39 42
0.40 43
0.41 44
0.42 45
0.44 46
0.44 47
0.46 48
0.48 49
0.48 50
0.50 51
0.51 52
0.53 53
0.54 54
0.56 55
0.57 56
0.59 57
0.60 58
0.62 59
0.63 60
0.65 61
0.67 62
0.69 63
0.71 64
0.73 65
0.75 66
0.77 67
0.79 68
0.81 69
0.84 70
0.86 71
0.88 72
0.91 73
0.92 74
0.95 75
0.97 76
1.01 77
1.03 78
1.05 79
1.08 80
1.11 81
1.15 82
1.18 83
1.23 84
1.27 85
1.31 86
1.35 87
1.39 88
1.44 89
1.51 90
1.58 91
1.67 92
1.74 93
1.85 94
2.01 95
2.18 96
2.43 97
2.77 98
3.51 99
8.71 100