Margaret Shaw wrote:
Census tracts were considered adequate for regional travel
simulation, except for the Philadelphia CBD, where block groups were used
to define TAZs.
Some tracts are too large or too small for network coding and modeling, and they
must be reviewed each decade because of tract splitting.
As I mentioned in my earlier note to the group, census tract boundaries
are really irrelevant to this task - some thinking "outside the box" is
the size of TAZs should be smaller for corridor and
sub-area studies and small MPOs.
?? The extent of the network being modeled is what's important, not
urban area size. And if you do plenty of corridor and sub-area studies
(as I do), than it makes more sense to have the zone delineation to
match the needs of these studies right from the start.
Cedar Rapids MPO