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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.

  • 28
  • 21
  • 14
  • 7
  • 0
  • 0
  • 10
  • 20
  • 30
  • 40
  • 50
  • 60
  • 70
  • 80
  • 90
  • 100
Measure Percentile
0 0
0.21 1
0.31 2
0.41 3
0.51 4
0.58 5
0.67 6
0.76 7
0.86 8
0.93 9
1.03 10
1.11 11
1.20 12
1.28 13
1.38 14
1.46 15
1.54 16
1.63 17
1.72 18
1.80 19
1.88 20
2.01 21
2.06 22
2.15 23
2.23 24
2.34 25
2.41 26
2.51 27
2.59 28
2.68 29
2.77 30
2.86 31
2.94 32
3.03 33
3.13 34
3.21 35
3.30 36
3.39 37
3.50 38
3.58 39
3.68 40
3.78 41
3.87 42
4.01 43
4.08 44
4.19 45
4.29 46
4.40 47
4.52 48
4.62 49
4.73 50
4.84 51
4.94 52
5.06 53
5.18 54
5.30 55
5.42 56
5.55 57
5.67 58
5.79 59
5.92 60
6.04 61
6.19 62
6.32 63
6.46 64
6.61 65
6.75 66
6.89 67
7.03 68
7.19 69
7.34 70
7.52 71
7.68 72
7.85 73
8.03 74
8.21 75
8.40 76
8.59 77
8.78 78
9.02 79
9.21 80
9.43 81
9.69 82
10.00 83
10.22 84
10.51 85
10.78 86
11.10 87
11.41 88
11.78 89
12.17 90
12.60 91
13.06 92
13.56 93
14.19 94
14.85 95
15.69 96
16.68 97
18.04 98
20.16 99
30.00 100