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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
0.60 5
0.68 6
0.77 7
0.86 8
0.93 9
1.03 10
1.12 11
1.21 12
1.29 13
1.38 14
1.47 15
1.56 16
1.64 17
1.72 18
1.81 19
1.89 20
2.02 21
2.07 22
2.16 23
2.25 24
2.34 25
2.42 26
2.51 27
2.59 28
2.68 29
2.77 30
2.86 31
2.93 32
3.03 33
3.13 34
3.21 35
3.30 36
3.41 37
3.51 38
3.61 39
3.70 40
3.80 41
3.89 42
4.01 43
4.09 44
4.19 45
4.29 46
4.40 47
4.51 48
4.61 49
4.73 50
4.84 51
4.94 52
5.06 53
5.18 54
5.30 55
5.42 56
5.54 57
5.67 58
5.80 59
5.91 60
6.04 61
6.18 62
6.30 63
6.45 64
6.60 65
6.75 66
6.90 67
7.03 68
7.18 69
7.35 70
7.51 71
7.67 72
7.82 73
8.02 74
8.19 75
8.38 76
8.57 77
8.79 78
9.03 79
9.23 80
9.45 81
9.69 82
10.00 83
10.23 84
10.51 85
10.80 86
11.12 87
11.43 88
11.78 89
12.15 90
12.59 91
13.03 92
13.53 93
14.14 94
14.86 95
15.72 96
16.76 97
18.13 98
20.31 99
30.00 100