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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
0.01 9
0.01 10
0.02 11
0.02 12
0.02 13
0.02 14
0.02 15
0.02 16
0.02 17
0.02 18
0.02 19
0.02 20
0.02 21
0.02 22
0.02 23
0.02 24
0.03 25
0.03 26
0.03 27
0.03 28
0.03 29
0.03 30
0.03 31
0.03 32
0.03 33
0.03 34
0.03 35
0.03 36
0.03 37
0.04 38
0.04 39
0.04 40
0.04 41
0.04 42
0.04 43
0.04 44
0.04 45
0.04 46
0.04 47
0.04 48
0.04 49
0.04 50
0.05 51
0.05 52
0.05 53
0.05 54
0.05 55
0.05 56
0.05 57
0.05 58
0.05 59
0.05 60
0.06 61
0.06 62
0.06 63
0.06 64
0.06 65
0.06 66
0.06 67
0.06 68
0.07 69
0.07 70
0.07 71
0.07 72
0.07 73
0.07 74
0.07 75
0.08 76
0.08 77
0.08 78
0.08 79
0.08 80
0.09 81
0.09 82
0.09 83
0.10 84
0.10 85
0.10 86
0.11 87
0.11 88
0.11 89
0.12 90
0.13 91
0.13 92
0.14 93
0.15 94
0.15 95
0.16 96
0.17 97
0.21 98
0.27 99
0.80 100