Table A-1: Time Series Characteristics of TSI Data Components,,,,,,,,,,
Mode,ARIMA model,Moving seasonality?,MCD1,Model2: additive or multiplicative?,Trading days (TD) & Holidays (H)3       ,,,,,
Rail passenger,(011) (011),No,5,M,No TD; all H,,,,,
Rail freight,,,,,,,,,,
   Carloads,No valid model yet,No,5,A,"TD, No H",,,,,
   Intermodals,(011) (011),No,3,A, No TD; Easter & Thanksgiving,,,,,
Trucking,(011) (011),No,3,A,TD; Easter ,,,,,
Waterborne,(011) (011),No,12,A,TD; No H,,,,,
Transit,(011) (011),No,4,A,TD; No H,,,,,
Aviation,,,,,,,,,,
   Freight,(011) (011),No ,3,M,TD and Easter & Thanksgiving,,,,,
   Passenger,(011) (011),"Yes, at 1% level",4,M,"No TD, All 3 H",,,,,
Pipeline,,,,,,,,,,
   Natural gas,(012) (011),No,7,M,TD; No H,,,,,
   Petroleum,(011) (011),No,5,M,"TD, No H",,,,,
"SOURCE: U.S. Department of Transportation, Research and Innovative Technology Administration, Bureau of Transportation Statistics, http://www.bts.gov.",,,,,,,,,,
1 MCD=Months to cyclical dominance.  3 months is normal for the trend to equal and surpass the irregularity; higher than 3 shows irregularity too high.,,,,,
2 M=Multiplicative Model  A=Additive Model,,,,,
"3 TD=Trading Days, H=(Moving) Holidays: Easter, Labor Day, and Thanksgiving.  Beginning January 27, 2005, Thanksgiving uses -3 for value, Easter is set at 2 for Trucking; otherwise, equals 7; Labor Day is always set at 4.",,,,,