[eternallyme]

Originally Posted by memph

Looks like the interchange number requirement was reduced to 15 by the US census bureau for 2010 CSAs. That means Wellington, Brant and Peterborough all make the cut, Niagara Region is right at 15 according to the transportation tomorrow survey, so it basically comes down to a rounding error whether it's included or not. This would add about 500-930k people depending on whether Niagara Region is included for a total of about 7.95-8.38 million for the Toronto CSA.

However, I'm not sure what the US census bureau does when an MSA qualifies for being in 2 CSAs, as is the case for Wellington with Waterloo Region and the GTAH. Wellington might be part of Waterloo Region's CSA rather than the GTAH's in this scenario.

Niagara would be more likely to fall in the Buffalo-Niagara Falls MSA/CSA in that case...