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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.

  • 20
  • 15
  • 10
  • 5
  • 0
  • 0
  • 10
  • 20
  • 30
  • 40
  • 50
  • 60
  • 70
  • 80
  • 90
  • 100
Measure Percentile
0 0
0.23 1
0.38 2
0.51 3
0.62 4
0.71 5
0.80 6
0.88 7
0.96 8
1.04 9
1.13 10
1.20 11
1.27 12
1.34 13
1.40 14
1.47 15
1.55 16
1.62 17
1.68 18
1.76 19
1.83 20
1.89 21
1.96 22
2.02 23
2.08 24
2.14 25
2.20 26
2.26 27
2.33 28
2.40 29
2.46 30
2.53 31
2.60 32
2.67 33
2.74 34
2.80 35
2.86 36
2.93 37
3.00 38
3.07 39
3.13 40
3.20 41
3.27 42
3.33 43
3.41 44
3.48 45
3.57 46
3.63 47
3.71 48
3.79 49
3.87 50
3.94 51
4.01 52
4.09 53
4.17 54
4.25 55
4.34 56
4.42 57
4.49 58
4.58 59
4.66 60
4.75 61
4.83 62
4.92 63
5.02 64
5.12 65
5.22 66
5.32 67
5.43 68
5.53 69
5.63 70
5.73 71
5.86 72
5.97 73
6.08 74
6.20 75
6.33 76
6.45 77
6.59 78
6.72 79
6.87 80
7.01 81
7.15 82
7.30 83
7.45 84
7.63 85
7.79 86
8.00 87
8.21 88
8.44 89
8.68 90
8.93 91
9.24 92
9.56 93
10.00 94
10.44 95
10.95 96
11.70 97
12.71 98
14.35 99
24.74 100