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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.

  • 1
  • 0.75
  • 0.5
  • 0.25
  • 0
  • 0
  • 10
  • 20
  • 30
  • 40
  • 50
  • 60
  • 70
  • 80
  • 90
  • 100
Measure Percentile
0 0
0.00 1
0.00 2
0.01 3
0.01 4
0.01 5
0.01 6
0.01 7
0.01 8
0.02 9
0.02 10
0.02 11
0.02 12
0.02 13
0.03 14
0.03 15
0.03 16
0.03 17
0.03 18
0.03 19
0.04 20
0.04 21
0.04 22
0.04 23
0.04 24
0.04 25
0.04 26
0.05 27
0.05 28
0.05 29
0.05 30
0.05 31
0.05 32
0.06 33
0.06 34
0.06 35
0.06 36
0.06 37
0.06 38
0.07 39
0.07 40
0.07 41
0.07 42
0.08 43
0.08 44
0.08 45
0.08 46
0.08 47
0.09 48
0.09 49
0.09 50
0.09 51
0.10 52
0.10 53
0.10 54
0.10 55
0.11 56
0.11 57
0.11 58
0.11 59
0.12 60
0.12 61
0.12 62
0.13 63
0.13 64
0.13 65
0.13 66
0.14 67
0.14 68
0.14 69
0.15 70
0.15 71
0.16 72
0.16 73
0.17 74
0.17 75
0.17 76
0.18 77
0.18 78
0.19 79
0.20 80
0.20 81
0.21 82
0.22 83
0.22 84
0.23 85
0.24 86
0.25 87
0.26 88
0.27 89
0.28 90
0.29 91
0.30 92
0.31 93
0.33 94
0.36 95
0.39 96
0.43 97
0.51 98
0.59 99
3.08 100