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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.

  • 48
  • 36
  • 24
  • 12
  • 0
  • 0
  • 10
  • 20
  • 30
  • 40
  • 50
  • 60
  • 70
  • 80
  • 90
  • 98
Measure Percentile
0 0
0.37 1
0.54 2
0.69 3
0.81 4
0.91 5
1.02 6
1.12 7
1.21 8
1.30 9
1.39 10
1.48 11
1.57 12
1.65 13
1.73 14
1.80 15
1.88 16
1.96 17
2.03 18
2.12 19
2.20 20
2.27 21
2.35 22
2.44 23
2.52 24
2.60 25
2.69 26
2.76 27
2.84 28
2.91 29
3.00 30
3.09 31
3.18 32
3.26 33
3.35 34
3.43 35
3.53 36
3.63 37
3.74 38
3.84 39
3.94 40
4.02 41
4.13 42
4.23 43
4.35 44
4.45 45
4.57 46
4.68 47
4.80 48
4.92 49
5.05 50
5.19 51
5.32 52
5.45 53
5.60 54
5.74 55
5.86 56
6.00 57
6.19 58
6.34 59
6.52 60
6.69 61
6.87 62
7.05 63
7.23 64
7.43 65
7.64 66
7.86 67
8.09 68
8.33 69
8.56 70
8.81 71
9.09 72
9.38 73
9.64 74
9.93 75
10.21 76
10.56 77
10.98 78
11.32 79
11.75 80
12.10 81
12.67 82
13.18 83
13.75 84
14.30 85
15.00 86
15.68 87
16.41 88
17.30 89
18.38 90
19.48 91
20.67 92
22.02 93
23.60 94
25.75 95
28.52 96
32.54 97
38.19 98
47.03 99
128.00 100