Earlier this month the AASHTO CTPP Oversight Board submitted a request
for a special tabulation of 3-year ACS tables. For those who might not
remember, just over a year ago the Oversight Board submitted a similar
request that met with some harsh disclosure and suppression rules.
After an appeal of the rules failed, the Oversight Board set up a
subcommittee to develop a new request that hopefully would be more
favorably received by the Census Bureau's Disclosure Review Board. It
was believed that now that the disclosure proofing rules are known it
would be possible to design data tables that would yield the maximum
utility possible while still adhering to the rules.
A copy of the new table request letter and tables can be found at the
following locations respectively.
One of the major differences of the new request from last year’s is that
modes used to go to work have been collapsed. In 2008 we were asking
for crosstabs using 5, 8 and 11 modes. With the 2009 request we are
asking for 3, 5, 6 and 10 modes. In addition to the collapsed modes the
number of variables crossed with “Means of Transportation to Work” has
been reduced from about 17 to 5. The 5 variables include travel time to
work, household income, vehicles available, age and time leaving home to
go to work. Of course it will not be known which tables will pass the
disclosure rules until we actually see the tables. The is also none
univariate table with all 18 modes. When reviewing the potential tables
do not forget that the 3-year ACS is only for areas with more than
The Census Bureau and their Disclosure Review Board (DRB) are currently
reviewing the proposal and the Oversight Board is hopeful that it will
be approved. Once the DRB is OK with the proposal it will pass over to
the ACS Office and they will prepare a cost estimate after which a final
decision by the Oversight Board will be made.
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