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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
0.28 1
0.44 2
0.57 3
0.65 4
0.73 5
0.82 6
0.91 7
0.98 8
1.03 9
1.08 10
1.13 11
1.18 12
1.24 13
1.30 14
1.35 15
1.40 16
1.45 17
1.48 18
1.54 19
1.57 20
1.62 21
1.65 22
1.68 23
1.72 24
1.76 25
1.81 26
1.86 27
1.90 28
1.94 29
2.00 30
2.04 31
2.08 32
2.13 33
2.17 34
2.20 35
2.25 36
2.29 37
2.34 38
2.39 39
2.44 40
2.48 41
2.53 42
2.57 43
2.62 44
2.66 45
2.70 46
2.75 47
2.82 48
2.88 49
2.92 50
2.97 51
3.02 52
3.09 53
3.14 54
3.18 55
3.24 56
3.31 57
3.37 58
3.43 59
3.47 60
3.53 61
3.59 62
3.69 63
3.75 64
3.82 65
3.89 66
3.94 67
4.02 68
4.12 69
4.19 70
4.26 71
4.34 72
4.41 73
4.48 74
4.59 75
4.70 76
4.78 77
4.87 78
4.96 79
5.09 80
5.21 81
5.31 82
5.43 83
5.55 84
5.66 85
5.82 86
5.95 87
6.09 88
6.29 89
6.44 90
6.64 91
6.81 92
7.05 93
7.28 94
7.58 95
7.94 96
8.45 97
8.94 98
9.73 99
17.89 100