Is anyone else scratching their heads on the 2010 proposed criteria for census tracts and block groups? Making the lowest level for census tracts 1,200 pop and the lowest for block groups 1,200 pop seems redundant. However, what concerns me are the amount of potential changes to the fundamental census geographic structure in 2010. In 1998/99 we sent our TAZ geography to the Census Bureau, so that it could be included in the development of the 2000 CTPP data. Only a few of our TAZs didn't match the Census Bureau's criteria for a TAZ (census block group boundary issues). Does anyone else think that we should wait to do CTPP/TAZ until "after" the 2010 Census? Due to the overhaul of block groups and possible changes in geography there is a great chance that we will have to redo many of our TAZ boundaries. This would be easier if we know the "new" geography. Any comments? Thanks, John John Sharp Program Coordinator Transportation Planning & Data Services 21 E. Main, Suite 100 Oklahoma City, OK 73104 Telephone: (405) 234-2264 FAX : (405) 234-2200 email: jmsharp(a)acogok.org Website: http://www.acogok.org <http://www.acogok.org/>