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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.

  • 20
  • 15
  • 10
  • 5
  • 0
  • 0
  • 10
  • 20
  • 30
  • 40
  • 50
  • 60
  • 70
  • 80
  • 90
  • 100
Measure Percentile
0 0
0.49 1
0.61 2
0.71 3
0.87 4
0.94 5
1.01 6
1.08 7
1.14 8
1.20 9
1.29 10
1.35 11
1.42 12
1.46 13
1.51 14
1.54 15
1.58 16
1.63 17
1.68 18
1.75 19
1.80 20
1.84 21
1.89 22
1.93 23
1.97 24
1.99 25
2.03 26
2.10 27
2.14 28
2.19 29
2.22 30
2.25 31
2.28 32
2.32 33
2.38 34
2.42 35
2.49 36
2.52 37
2.57 38
2.64 39
2.68 40
2.71 41
2.77 42
2.81 43
2.86 44
2.89 45
2.94 46
2.98 47
3.01 48
3.05 49
3.08 50
3.12 51
3.17 52
3.21 53
3.25 54
3.31 55
3.36 56
3.42 57
3.47 58
3.51 59
3.55 60
3.63 61
3.69 62
3.74 63
3.81 64
3.90 65
3.95 66
4.02 67
4.10 68
4.19 69
4.23 70
4.31 71
4.39 72
4.50 73
4.62 74
4.69 75
4.77 76
4.86 77
4.96 78
5.09 79
5.22 80
5.34 81
5.49 82
5.59 83
5.72 84
5.81 85
6.02 86
6.18 87
6.39 88
6.58 89
6.77 90
7.03 91
7.41 92
7.84 93
8.31 94
9.00 95
9.96 96
11.06 97
13.00 98
15.11 99
300.00 100