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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
0.52 3
0.62 4
0.71 5
0.82 6
0.90 7
0.98 8
1.06 9
1.14 10
1.21 11
1.29 12
1.36 13
1.42 14
1.49 15
1.57 16
1.63 17
1.70 18
1.76 19
1.83 20
1.90 21
1.97 22
2.03 23
2.10 24
2.16 25
2.23 26
2.29 27
2.36 28
2.42 29
2.49 30
2.55 31
2.62 32
2.69 33
2.76 34
2.83 35
2.90 36
2.96 37
3.03 38
3.10 39
3.16 40
3.23 41
3.30 42
3.37 43
3.44 44
3.51 45
3.58 46
3.65 47
3.73 48
3.81 49
3.88 50
3.96 51
4.02 52
4.09 53
4.17 54
4.25 55
4.34 56
4.42 57
4.50 58
4.59 59
4.67 60
4.76 61
4.84 62
4.94 63
5.02 64
5.12 65
5.21 66
5.29 67
5.38 68
5.49 69
5.60 70
5.70 71
5.81 72
5.93 73
6.04 74
6.15 75
6.28 76
6.39 77
6.53 78
6.66 79
6.81 80
6.95 81
7.09 82
7.26 83
7.42 84
7.58 85
7.78 86
7.96 87
8.16 88
8.40 89
8.64 90
8.86 91
9.16 92
9.48 93
9.90 94
10.33 95
10.93 96
11.64 97
12.65 98
14.07 99
25.01 100