RE: [CTPP] Draft ACS Proposed Transportation-Related Tables

More clarification on when ACS data will be available. Areas with 65,000+ population will have annual data. Areas with 20,000+ population will have data provided annually, using a 3-year accumulation. Therefore, 2005 thru 2007 data will be available starting in 2008. Then, 2006-2008 data will be available in 2009. Areas with less than 20,000+ (small towns, census tracts, block groups) will require 5 years of data accumulation, but the Census Bureau says they will also make these tabulations available annually, with 5-year accumulations. Therefore, the first data available should be 2005-2009, with release in 2010. And then 2006-2010 available in 2011. One of my concerns is that for these small areas, 2005-2009 data will be weighted to the county estimates numbers, and the 2006-2010 will be weighted to 2010 decennial census data. So, there will likely be a discontinuity at this point. Elaine Murakami FHWA Office of Planning 206-220-4460 -----Original Message----- From: Ed Christopher [mailto:edc@berwyned.com] Sent: Wednesday, May 25, 2005 9:13 AM To: Nancy Reger Cc: Murakami, Elaine; ctpp-news maillist Subject: Re: [CTPP] Draft ACS Proposed Transportation-Related Tables Nancy--I am responding to whole listserve as I bet this probably confusing to all of us. The ACS will give us tables every year. Areas over 65K population will get annual data while areas with 20k to 65K will get tables every 3 years and areas under 20k will tables every 5 years. The tables that the Census Bureau (CB) will produce are what we know as standard tabulations, like what is in SF1 and SF3. For ACS I have also heard the "standard tabulations" refereed to a "basic tables". These are separate from the CTPP tables which are a special tabulation paid for by the MPOs and States. Almost a year ago the CB put a notice in the federal register asking for suggestions on tables to include in the ACS Standard Tabulations. The tables in question are the transportation related tables that are getting proposed by CB staff to their internal management and "disclosure review board" as a result of the federal register process. We should be excited, in a way, because at least a few of the cross tabs that we have to pay for as the special tabulation (CTPP product) are getting proposed as a standard tabs which means that they will enjoy all the benefits of the tables in the current SF products. The downside is that not all the tables we would want (or think we want) are moved over to the standard product. What you do see that is revolutionary, is the proposed work place tables. These are only proposed by CB staff so there is not yet guarantee that we will see them as a standard product. This needs to be watched carefully by all of us. Another thing that is not on the table are any flow tables (Part 3 like tables). CB staff did not even propose any flow tables and the issues of geography, rounding and most of all thresholds play heavily in any discussion of flow data. As for TAZs, these are a whole different subject and not being considered by CB staff as a tabulation geography for the "Standard" ACS tables. One thing that I am hearing on geography that is worth tuning into is, that PUMAs are going to be a tabulation geography for ACS. At least this is what I hear but I have not seen anything in writing to confirm this. Maybe the CB staff on this listserve could expound on this. Nancy Reger wrote: -- Ed Christopher 708-283-3534 (V) 708-574-8131 (cell) FHWA RC-TST-PLN 19900 Governors Dr Olympia Fields, IL 60461