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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.

  • 60
  • 45
  • 30
  • 15
  • 0
  • 0
  • 10
  • 20
  • 30
  • 40
  • 50
  • 60
  • 70
  • 80
  • 90
  • 100
Measure Percentile
0 0
0.09 1
0.13 2
0.17 3
0.21 4
0.24 5
0.28 6
0.31 7
0.34 8
0.38 9
0.42 10
0.44 11
0.47 12
0.49 13
0.52 14
0.55 15
0.58 16
0.61 17
0.64 18
0.68 19
0.71 20
0.74 21
0.78 22
0.81 23
0.85 24
0.87 25
0.90 26
0.93 27
0.97 28
1.01 29
1.05 30
1.09 31
1.13 32
1.17 33
1.22 34
1.25 35
1.30 36
1.33 37
1.38 38
1.44 39
1.48 40
1.51 41
1.55 42
1.60 43
1.64 44
1.70 45
1.75 46
1.81 47
1.86 48
1.91 49
1.96 50
2.01 51
2.08 52
2.16 53
2.21 54
2.29 55
2.36 56
2.45 57
2.54 58
2.61 59
2.72 60
2.87 61
2.94 62
3.02 63
3.16 64
3.29 65
3.42 66
3.58 67
3.68 68
3.83 69
3.96 70
4.11 71
4.27 72
4.46 73
4.62 74
4.82 75
5.02 76
5.33 77
5.60 78
5.83 79
6.11 80
6.38 81
6.75 82
7.08 83
7.56 84
7.93 85
8.35 86
8.76 87
9.22 88
9.86 89
10.55 90
11.26 91
12.73 92
14.19 93
16.52 94
18.40 95
21.34 96
25.32 97
32.17 98
47.25 99
167.00 100