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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.

  • 12
  • 9
  • 6
  • 3
  • 0
  • 0
  • 10
  • 20
  • 30
  • 40
  • 50
  • 60
  • 70
  • 80
  • 90
  • 100
Measure Percentile
0 0
0.27 1
0.43 2
0.55 3
0.66 4
0.75 5
0.81 6
0.87 7
0.94 8
1.01 9
1.07 10
1.13 11
1.20 12
1.24 13
1.29 14
1.34 15
1.39 16
1.43 17
1.48 18
1.52 19
1.56 20
1.60 21
1.64 22
1.68 23
1.71 24
1.76 25
1.82 26
1.86 27
1.92 28
1.95 29
2.00 30
2.06 31
2.10 32
2.16 33
2.19 34
2.22 35
2.27 36
2.31 37
2.35 38
2.40 39
2.44 40
2.49 41
2.54 42
2.58 43
2.61 44
2.66 45
2.71 46
2.75 47
2.81 48
2.87 49
2.93 50
2.97 51
3.01 52
3.06 53
3.10 54
3.16 55
3.23 56
3.30 57
3.35 58
3.39 59
3.48 60
3.53 61
3.58 62
3.64 63
3.73 64
3.78 65
3.85 66
3.96 67
4.03 68
4.11 69
4.18 70
4.25 71
4.35 72
4.44 73
4.53 74
4.63 75
4.71 76
4.79 77
4.89 78
4.99 79
5.07 80
5.18 81
5.30 82
5.39 83
5.53 84
5.65 85
5.74 86
5.88 87
6.04 88
6.18 89
6.36 90
6.50 91
6.72 92
6.93 93
7.15 94
7.55 95
7.90 96
8.36 97
8.88 98
9.68 99
19.98 100