Re: Geographic coverage, C2SS & ACS - ctpp-news

8 Nov 2001

----- Original Message -----
From: "Ed Herlihy (@home.com)" &lt;ed.herlihy(a)home.com&gt;
To: "ed christopher" &lt;edc(a)berwyned.com&gt;
Sent: Thursday, November 08, 2001 7:06 PM
Subject: Re: [CTPP] Re: Geographic coverage, C2SS & ACS

...
  I would be happy with tract level data if the JTW info
provides some better
...
  data on total retail versus non ratail jobs at the
destination end of the
 work trip.  Localities have pretty good data on square footage by type but
 have lots of trouble keeping up with small area job estimates.  The jobs per
...
  square foot estimates seem like a moving target these
days

 I know the data is there, but I am not sure the CTPP or this new ACS tabs
 will do a retail vs non-retail tabulation.

 I hope so, because of lot of forecasting models use jobs for work trip
 attration estimates.

 Ed Herlihy
 Transportation Consultant
 Alexandria VA
 703-914-4850

 ----- Original Message -----
 From: "ed christopher" &lt;edc(a)berwyned.com&gt;
 To: "'ctpp-news maillist'" &lt;ctpp-news(a)chrispy.net&gt;
 Sent: Thursday, November 08, 2001 4:36 PM
 Subject: Re: [CTPP] Re: Geographic coverage, C2SS & ACS

  since patty raised the issue of tracts, i have
often wondered why do we  have tracts?  why don't we
  have a zonal system in urban areas that is
created by the public data  users--something like TAZs.  in
  many areas the TAZs are developed by a collection
agencies with planning  and data responsibilities.
  if memory serves me tracts were historically a
creation of the census  bureau which is a data
  collector.  TAZs are a product of regional
planning organizations (which  happen to have
 > transportation responsibilities) which are data users.
 >
 > Patty Becker wrote:
 >
 > > Again, please feel free to post this to the list serve if you wish.
 > >
 > > My clear understanding is that "small area" means tract.  I don't
think
...
  > > anyone thinks the 60 month data will be good
enough for block groups.
 > >
 > > If TAZs are tract equivalent, then the data should be as good as for
 > > tracts.  For heavy attractor TAZs which are split below tract level, the
...
  > > transportation community has to negotiate
with the bureau for a special
...
  tab
  > to deliver all TAZs.  The data should
support the tab
 > adequately,  Meanwhile, of course, someone is going to have to be
 > responsible (MPO by MPO and state by state) for keeping the geocoding  file
  > up to date!
 >
 > No one knows whether these 60 month data are going to "feel right." 
Only
  > time will tell.  But in any event the CTPP
users will have data  equivalent
  > to that for all users who use tracts. 
Meanwhile, we still have all  these
   hurdles
in Congress, etc. etc.

 Patty Becker 
 ---
 Ed Christopher
 Metropolitan Specialist
 Midwest Resource Center
 Federal Highway Administration
 19900 Governors Drive
 Olympia Fields, Illinois  60461
 708-283-3534 (V)
 708-283-3501 (F)