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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
0.47 1
0.65 2
0.76 3
0.90 4
0.98 5
1.02 6
1.09 7
1.14 8
1.19 9
1.23 10
1.30 11
1.37 12
1.44 13
1.50 14
1.51 15
1.54 16
1.58 17
1.64 18
1.70 19
1.73 20
1.78 21
1.80 22
1.86 23
1.90 24
1.93 25
1.98 26
2.02 27
2.05 28
2.11 29
2.14 30
2.18 31
2.24 32
2.26 33
2.31 34
2.37 35
2.42 36
2.46 37
2.49 38
2.55 39
2.59 40
2.63 41
2.68 42
2.73 43
2.77 44
2.81 45
2.84 46
2.89 47
2.95 48
2.99 49
3.03 50
3.08 51
3.12 52
3.17 53
3.20 54
3.23 55
3.30 56
3.33 57
3.39 58
3.45 59
3.49 60
3.57 61
3.61 62
3.65 63
3.71 64
3.78 65
3.85 66
3.89 67
3.94 68
3.99 69
4.04 70
4.12 71
4.20 72
4.30 73
4.39 74
4.48 75
4.61 76
4.66 77
4.76 78
4.83 79
4.91 80
5.05 81
5.21 82
5.42 83
5.53 84
5.72 85
5.91 86
6.05 87
6.24 88
6.47 89
6.73 90
7.01 91
7.32 92
7.68 93
8.02 94
8.66 95
9.36 96
11.43 97
12.27 98
14.55 99
434.00 100