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FMCSA - Federal Motor Carrier Safety Adminstration

CSA - Compliance, Safety, Accountability

Working Together for Safety.


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
  • 98
Measure Percentile
0 0
0.31 1
0.45 2
0.58 3
0.70 4
0.81 5
0.89 6
0.99 7
1.07 8
1.14 9
1.22 10
1.30 11
1.37 12
1.44 13
1.51 14
1.59 15
1.67 16
1.73 17
1.82 18
1.89 19
1.97 20
2.04 21
2.11 22
2.18 23
2.25 24
2.32 25
2.40 26
2.46 27
2.54 28
2.62 29
2.70 30
2.79 31
2.87 32
2.96 33
3.02 34
3.13 35
3.20 36
3.30 37
3.40 38
3.50 39
3.58 40
3.68 41
3.78 42
3.90 43
4.00 44
4.07 45
4.18 46
4.29 47
4.39 48
4.50 49
4.63 50
4.75 51
4.88 52
5.00 53
5.13 54
5.25 55
5.40 56
5.54 57
5.69 58
5.84 59
6.00 60
6.17 61
6.33 62
6.50 63
6.67 64
6.87 65
7.07 66
7.29 67
7.50 68
7.76 69
8.00 70
8.26 71
8.52 72
8.78 73
9.01 74
9.39 75
9.70 76
10.03 77
10.43 78
10.85 79
11.23 80
11.71 81
12.26 82
12.82 83
13.41 84
14.00 85
14.72 86
15.44 87
16.19 88
17.22 89
18.44 90
19.81 91
21.04 92
22.86 93
24.62 94
27.01 95
30.01 96
34.02 97
40.11 98
50.34 99
188.00 100