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United States Department of Transportation United States Department of Transportation

Table 3. Model for Seasonally Adjusting Vehicle Miles Traveled (VMT)

Wednesday, April 22, 2015

 

Model Type (1) Transformation Trading days / Significance (3) Holidays (2) / Significance (3) Outliers ARIMA(4)
A None Day-of-week *** Labor Day ** None (0 1 1)(0 1 1)
A None Day-of-week *** Thanksgiving * None (0 1 1)(0 1 1)


(1) A = Additive

(2) Holidays

Labor Day = Friday before to Tuesday after (5 days).

Thanksgiving = Tuesday before to Sunday after (7 days)

(3) Significance

*** = significant at 0.01 level

** = significant at 0.05 level

* = significant at 0.10 level

N/S = not significant at 0.10 level

N/A = not applicable

(4) ARIMA = Autoregressive integrated moving average

Source: U.S. Department of Transportation, Bureau of Transportation Statistics