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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.

  • 16
  • 12
  • 8
  • 4
  • 0
  • 0
  • 10
  • 20
  • 30
  • 40
  • 50
  • 60
  • 70
  • 80
  • 90
  • 100
Measure Percentile
0 0
0.52 1
0.65 2
0.67 3
0.80 4
0.87 5
0.90 6
0.93 7
1.04 8
1.07 9
1.09 10
1.13 11
1.14 12
1.18 13
1.21 14
1.24 15
1.29 16
1.31 17
1.33 18
1.36 19
1.42 20
1.43 21
1.44 22
1.47 23
1.48 24
1.51 25
1.53 26
1.58 27
1.62 28
1.66 29
1.68 30
1.70 31
1.72 32
1.76 33
1.80 34
1.81 35
1.84 36
1.87 37
1.89 38
1.90 39
1.93 40
1.95 41
1.99 42
2.00 43
2.04 44
2.08 45
2.11 46
2.13 47
2.15 48
2.18 49
2.20 50
2.22 51
2.25 52
2.27 53
2.29 54
2.31 55
2.34 56
2.35 57
2.36 58
2.37 59
2.41 60
2.44 61
2.50 62
2.56 63
2.59 64
2.62 65
2.66 66
2.69 67
2.70 68
2.75 69
2.82 70
2.86 71
2.93 72
2.95 73
2.97 74
3.05 75
3.12 76
3.18 77
3.23 78
3.33 79
3.45 80
3.54 81
3.57 82
3.62 83
3.67 84
3.81 85
3.88 86
3.92 87
4.04 88
4.34 89
4.43 90
4.80 91
5.14 92
5.41 93
5.63 94
6.04 95
6.28 96
6.85 97
7.63 98
10.03 99
30.89 100