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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
0.05 2
0.05 3
0.06 4
0.08 5
0.09 6
0.11 7
0.13 8
0.15 9
0.17 10
0.19 11
0.21 12
0.23 13
0.25 14
0.27 15
0.29 16
0.30 17
0.32 18
0.34 19
0.35 20
0.37 21
0.39 22
0.41 23
0.43 24
0.45 25
0.47 26
0.48 27
0.51 28
0.52 29
0.54 30
0.56 31
0.58 32
0.60 33
0.62 34
0.64 35
0.67 36
0.68 37
0.70 38
0.72 39
0.75 40
0.77 41
0.79 42
0.81 43
0.84 44
0.86 45
0.88 46
0.91 47
0.93 48
0.96 49
1.00 50
1.02 51
1.04 52
1.06 53
1.09 54
1.12 55
1.15 56
1.17 57
1.20 58
1.24 59
1.27 60
1.31 61
1.35 62
1.38 63
1.41 64
1.45 65
1.50 66
1.53 67
1.57 68
1.61 69
1.65 70
1.70 71
1.75 72
1.79 73
1.84 74
1.90 75
1.95 76
2.01 77
2.06 78
2.12 79
2.17 80
2.23 81
2.29 82
2.37 83
2.44 84
2.52 85
2.61 86
2.71 87
2.79 88
2.90 89
3.02 90
3.15 91
3.29 92
3.46 93
3.67 94
3.90 95
4.15 96
4.49 97
4.97 98
5.73 99
13.11 100