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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
0.37 1
0.54 2
0.69 3
0.80 4
0.92 5
1.03 6
1.12 7
1.21 8
1.29 9
1.39 10
1.47 11
1.56 12
1.66 13
1.74 14
1.82 15
1.91 16
1.99 17
2.06 18
2.14 19
2.22 20
2.29 21
2.37 22
2.46 23
2.53 24
2.60 25
2.69 26
2.78 27
2.86 28
2.98 29
3.05 30
3.14 31
3.23 32
3.32 33
3.40 34
3.50 35
3.59 36
3.68 37
3.77 38
3.89 39
4.00 40
4.08 41
4.17 42
4.28 43
4.38 44
4.50 45
4.59 46
4.70 47
4.82 48
4.95 49
5.07 50
5.18 51
5.31 52
5.45 53
5.61 54
5.75 55
5.89 56
6.00 57
6.20 58
6.35 59
6.53 60
6.70 61
6.89 62
7.08 63
7.29 64
7.50 65
7.74 66
8.00 67
8.24 68
8.45 69
8.73 70
9.00 71
9.25 72
9.52 73
9.81 74
10.18 75
10.50 76
10.96 77
11.32 78
11.69 79
12.17 80
12.54 81
13.07 82
13.67 83
14.17 84
14.87 85
15.51 86
16.37 87
17.29 88
18.34 89
19.33 90
20.50 91
21.84 92
23.59 93
25.50 94
28.00 95
31.07 96
35.00 97
40.69 98
49.09 99
126.00 100