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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
0.09 1
0.13 2
0.17 3
0.20 4
0.24 5
0.28 6
0.31 7
0.36 8
0.38 9
0.41 10
0.43 11
0.47 12
0.50 13
0.53 14
0.56 15
0.59 16
0.62 17
0.65 18
0.68 19
0.70 20
0.73 21
0.76 22
0.79 23
0.82 24
0.85 25
0.88 26
0.92 27
0.94 28
0.99 29
1.02 30
1.07 31
1.10 32
1.15 33
1.20 34
1.24 35
1.28 36
1.31 37
1.36 38
1.41 39
1.46 40
1.51 41
1.57 42
1.62 43
1.66 44
1.72 45
1.78 46
1.85 47
1.90 48
1.95 49
2.02 50
2.08 51
2.14 52
2.20 53
2.26 54
2.33 55
2.41 56
2.49 57
2.57 58
2.64 59
2.75 60
2.82 61
2.94 62
3.04 63
3.17 64
3.30 65
3.41 66
3.50 67
3.61 68
3.71 69
3.86 70
4.00 71
4.19 72
4.33 73
4.54 74
4.71 75
4.87 76
5.17 77
5.46 78
5.63 79
5.87 80
6.12 81
6.50 82
6.86 83
7.20 84
7.67 85
8.01 86
8.57 87
9.09 88
9.52 89
10.42 90
11.29 91
12.34 92
13.67 93
15.24 94
17.04 95
20.18 96
23.53 97
30.73 98
46.46 99
165.00 100