Bureau of Transportation Statistics (BTS)
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TABLE 12 Comparison of Updated and Observed Average Trip Lengths

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  Sample HBW HBO NHB
Mean SE of mean Mean SE of mean Mean SE of mean
Unweighted KY add-on sample 25.6 0.604 21.3 0.295 18.7 0.403
KY standard sample 23.7 1.692 20.1 0.690 20.6 0.685
Updated data 25.4 0.422 21.1 0.289 19.2 0.388
Similar-SE-states sample 21.0 0.473 17.1 0.188 18.3 0.285
National sample 21.1 0.194 17.3 0.082 18.6 0.120
Weighted KY add-on sample 25.1 0.610 20.4 0.303 18.0 0.411
KY standard sample 24.2 1.705 20.3 0.711 20.3 0.702
Updated data 25.0 0.428 20.4 0.297 18.6 0.396
Similar-SE-states sample 21.7 0.492 17.6 0.197 18.8 0.308
National sample 21.5 0.199 17.7 0.088 18.6 0.125

Key: HBW = home-based work; HBO = home-based other; NHB = nonhome-based; SE = standard error.

Sources: Calculations based on data from 2001 NHTS national sample and Kentucky add-on sample.