TECHNICAL NOTES

              Census Transportation Planning Package 2000
                      Place of Residence Profiles



HOUSEHOLD INCOME IN 1999
In a small number of cases, the mean household income and median household 
income figures shown in the CTPP2000 profiles differ from those published 
in other Census 2000 products. These differences of one dollar are the 
result of software rounding differences and hardware numeric precision 
differences between the two platforms used to create the products.


HOUSEHOLD SIZE BY VEHICLES AVAILABLE
In special tabulations from Census 2000, figures that do not duplicate data 
released in standard census products are rounded. In this tabulation values 
from 1 through 7 have been rounded to 4. All other estimates have been 
rounded to the nearest multiple of 5. Also see the note below on vehicles 
available.


MEANS OF TRANSPORTATION TO WORK BY TRAVEL TIME TO WORK
In special tabulations from Census 2000, figures that do not duplicate data 
released in standard census products are rounded. In this tabulation values 
from 1 through 7 have been rounded to 4. All other estimates have been 
rounded to the nearest multiple of 5.


MICROSOFT EXCEL 97 PROBLEM
There is a display problem when the CTPP2000 profiles in HTML format are 
opened in Microsoft Excel 97. The problem is that the second column (column B) 
of the spreadsheet is hidden from view. To display column B, right-click the 
mouse over either the column A or column C header, and choose Unhide from the
pop-up menu. This problem appears to be corrected in later versions of
Microsoft Excel.


VEHICLES AVAILABLE
The data in CTPP2000 on vehicles available are tabulated for households. 
This is different than in standard census products, where data on vehicles
available are tabulated for housing units. Although the estimates are 
usually quite close, the number of housing units is not always equal to the 
number of households. Therefore, the distribution of vehicles available 
shown in CTPP2000 will not exactly match the distribution presented in
standard census products.


WORKERS BY SEX
In special tabulations from Census 2000, figures that do not duplicate data 
released in standard census products are rounded. In this tabulation values 
from 1 through 7 have been rounded to 4. All other estimates have been 
rounded to the nearest multiple of 5. The 1990 census data shown in this
table have not been rounded.