ctpp-news March 2011

ctpp-news@mailman.chrispy.net

56 participants
45 discussions

by Ed Christopher

Subsequent to my last post the Census Bureau has made a revision to the TAZ User Guide. The new (Latest) one is attached. I could not tell what changed and I apologize for any trouble this may have caused. -- Ed Christopher FHWA Resource Center Planning Team 4749 Lincoln Mall Drive, Suite 600 Matteson, IL 60443 708-283-3534 (V) 708-574-8131 (C)

13 years, 9 months

2010 Population Data Release

by Ed Christopher

Next week the Census Bureau plans to release the last group of states including Maine, Massachusetts, Michigan, New Hampshire, New York, Rhode Island,South Carolina, West Virginia, District of Columbia and Puerto Rico. -- Ed Christopher 708-283-3534 (V) 708-574-8131 (cell) FHWA RC-TST-PLN 4749 Lincoln Mall Drive, Suite 600 Matteson, IL 60443

13 years, 9 months

CTPP 5-year (2006-2010 ACS) schedule

by Elaine.Murakami＠dot.gov

Hi Diana - I thought I had responded to your query, but I was looking at the listserv archive and saw that it was not answered on the CTPP listserv. The current expectations are that the CB would deliver to AASHTO a CTPP 5-year file (with TAZ and TAD as tabulation geography) by December 31, 2012. But, then, AASHTO would need to work with someone for web-based data access. For the CTPP 2006-2008, Beyond 2020 is the main contractor. From the time the CB delivered the CTPP 3-year file, it took over 4 months to get the data on the AASHTO website, but there was a steep learning curve, and the CB did not supply any TEST data for the software developer to use, only empty table shells. Being an optimist, it would presumably take less than 4 months in the next iteration, however, the very large number of TAZs and census tracts are likely to give any software vendor a headache, especially with the flow tabulations (Part 3). Elaine

13 years, 9 months

TAZ delineation training session from February 25.

by Elaine.Murakami＠dot.gov

Hi Everyone - some of you are NOT involved in TAZ delineation, so you can just DELETE this email! But, in case you are involved, and were not able to attend the webinars that we held on 2/25 and 2/28, here is a link to the recorded session. http://fhwa.adobeconnect.com/p11971019/ <http://fhwa.adobeconnect.com/p11971019/> This session will be archived and posted on the AASHTO CTPP webpage TAZ area: http://ctpp.transportation.org/Pages/taz.aspx in the near future, as it will not live on the FHWA NHI site for very long. The Census Bureau Geography Division expects the TAZ software to be final by March 16, but the geographic files for all of the nation may not be available at that time, which is why the term "rolling" release has been used. Since the Census Bureau Geography Division says that the 90-day turn-around time is FIRM, you will need to start working on this ASAP! But please note, TAZ delineation is not mandatory for CTPP. You can use census tracts (default) or census block groups as your small tabulation geography for CTPP. We will update the FAQs for TAZ delineation (currently posted on both the AASHTO page and the FHWA page http://www.fhwa.dot.gov/ctpp/tazfaq.htm ) based on the questions and answers from the sessions held on 2/25 and 2/28. If you are interested in using 2010 Census Block Equivalency Files as a starting point, the instructions are posted on the FHWA page: http://www.fhwa.dot.gov/ctpp/tazmtps.htm Elaine Murakami FHWA Office of Planning 206-220-4460

13 years, 9 months

How small is small ? Thoughts on TAZs

by Elaine.Murakami＠dot.gov

Many of you will be working on TAZ and TAD delineations, starting on March 16. March 16 is the day the Census Bureau Geography office hopes to have the software and User Guide available, and for many states to have the geographic files for downloading. If you are part of the TAZ delineation program, you will get a email directly from the Census Bureau with the password information. I have been reading the NCHRP 08-79 Task 6 "validation phase" report. (The August 2010 CTPP Status Report includes an article about this project http://www.fhwa.dot.gov/ctpp/sr1008.htm ) You will recall that this project is developing a method to create partially synthetic microdata ACS records to use in the CTPP 5-year (2006-2010) tabulation. This is necessary otherwise, most of the tables with the variable "means of transportation to work" would be suppressed. That is, for this round of the CTPP, "partially synthetic data" was determined to be preferred to data suppression for small geography. Only SOME of the CTPP tables are deemed to be risky for individual disclosure, so only SOME of the CTPP tables will have to use the synthetic microdata records. The other CTPP tables will use the actual ACS microdata records. If you attended the TAZ training webinars (2/25 and 2/28), and if you reviewed the TAZ software specifications, you know that the software WILL allow for very small TAZs, but the software will warn you if the resident or estimated worker counts are below 600. In the NCHRP 08-79 validation phase, the actual ACS data was compared to the synthetic ACS in the protected environment at the Census Bureau. For a medium sized MPO in the test, the MPO's new TAZ system for their regional model has very small TAZs (on average only 300 residents per TAZ), and in CTPP2000, the average was 1000 per TAZ. Although the synthetic data performed as well as the actual ACS in model output runs, Westat found that the "ACS cell sample size will create data usability issues for transportation planners at fine levels of geography, e.g. TAZs, for cross-tabulations of key variables with means of transportation." So, you have a choice. For defining TAZs for CTPP, you can make larger TAZs than for your model and have less data perturbation, or you can make very small TAZs and have a lot of data perturbation. Elaine Murakami FHWA Office of Planning 206-220-4460

13 years, 9 months

TAZ Delineation Webinar recording

by Weinberger, Penelope

Hi All, In case you could not attend the TAZ Delineation Webinar, a recording of it, and all its supporting materials, has been posted to the CTPP TAZ page, along with an updated TAZ FAQ sheet. Please feel free to watch the webinar - it is likely of interest only to those users directly involved in TAZ delineation. The link to the page is: http://ctpp.transportation.org/Pages/taz.aspx Penelope Weinberger CTPP Program Manager AASHTO 202-624-3556 http://ctpp.transportation.org/Pages/default.aspx <http://ctpp.transportation.org/Pages/default.aspx> It's just as bad to not make a plan as to blindly follow the one you already have.

13 years, 9 months

CENSUS DATA FOR TRANSPORTATION APPLICATIONS CONFERENCE -- CALL FOR PRESENTATIONS DUE MARCH 29

by Kreideweis, Jonette (DOT)

Planning is underway for the Using Census Data for Transportation Applications Conference, scheduled for October 25-27, 2011 at the Arnold and Mabel Beckman Center of the National Academies in Irvine, California. The conference is supported by the TRB, AASHTO, FHWA and FTA. The conference planning team is soliciting presentations for the conference, with abstracts (400 word max) due by March 29, 2011. Information on conference objectives and the process for submitting presentation proposals can be found at: http://onlinepubs.trb.org/onlinepubs/Conferences/2011/Census/Call_for_Prese… Key questions to be addressed at the conference include: * How are census data being used to support transportation planning, policy, and modeling activities and decision? * What are the challenges of using data from the ACS, CTPP and other census products for transportation planning? * How are transportation decision-making data needs changing for residence, workplace and journey-to-work flow data, and how do available public and private data sources best meet these needs? PRIORITY WILL BE GIVEN TO PUBLIC AGENCY AND STUDENT PRESENTATIONS. COMPLIMENTARY REGISTRATION AND LIMITED TRAVEL SUPPORT MAY BE AVAILABLE FOR PUBLIC AGENCY AND STUDENT PRESENTATIONS THAT ALIGN WITH CONFERENCE OBJECTIVES. Please feel free to share the call for presentations with others who may be interested in participating. We look forward to hearing from you on your experiences in using census data for transportation planning applications and on your current and future needs for these data. Thank you. Jonette Kreideweis Minnesota DOT Chair, TRB Conference Planning Task Force

13 years, 9 months

RE: [CTPP] Rules for 2010 Count Question Resolution Program

by Patty Becker

Paul -- well, at least they got counted somewhere! But yes, the geographic misassignments of GQ in 2000 were legion. Patty Becker At 12:26 PM 3/9/2011, you wrote: >Robert-- > >Sounds familiar, we discovered thousands of apparently homeless Michigan >State University students were actually residing in steam tunnels >underground beneath Spartan Stadium-- instead of their student housing >complexes, and probably for similar reasons. > >Admittedly, there have been reports of few drunken escapades in University >lore about those tunnels allegedly under the stadium-- but those events (if >true) typically weren't the kinds of things that would get reported to any >federal Bureau on Census day....... > >Paul T. Hamilton, >Chief Planner >Tri-County Regional Planning Commission >913. W. Holmes Rd. Ste. 201 >Lansing MI 48910 >phamilton(a)mitcrpc.org >Phone: 517.393.0342 >Fax: 517.393.4424 >web: www.mitcrpc.org >-----Original Message----- >From: ctpp-news-bounces(a)chrispy.net [mailto:ctpp-news-bounces@chrispy.net] >On Behalf Of Allen, Robert. >Sent: Tuesday, March 08, 2011 3:01 PM >To: 'ctpp-news(a)chrispy.net' >Subject: RE: [CTPP] Rules for 2010 Count Question Resolution Program > > >This appears to be similar to the 2000 program. We had some significant >misassignments of data that affected census tracts and smaller units, in one >case in a monster fashion. (Someone at the Bureau made a manual change that >resulted in geocoding an entire prison population of over 4,000 into a tiny >empty block across the highway from the prison instead of the special tract >that had been created for it. One of the results was that we were reported >to have one of the ten highest population density blocks in the nation.) The >Census Bureau said that it would only make revisions if the misgeocoded >counts changed the totals for political jurisdictions and even those >revisions would not be included in any products that were produced in the >Census year, 2000, nor would those products be later revised. We have spent >the last ten years repeatedly explaining why some of our local data differed >from the official census counts and why our counts are actually correct. > >Robert R. Allen, AICP >Abilene MPO >400 Oak St. #102, Abilene, TX 79602 > >Phone 325-676-6243 >Fax 325-676-6398 > > > > >-----Original Message----- >From: ctpp-news-bounces(a)chrispy.net [mailto:ctpp-news-bounces@chrispy.net] >On Behalf Of Ed Christopher >Sent: Tuesday, March 08, 2011 10:31 AM >To: ctpp-news(a)chrispy.net >Subject: Re: [CTPP] Rules for 2010 Count Question Resolution Program > >Wendell, here is what the rule says... It's sorta clear as mud. Maybe >someone can clarify. >----------------- >Challenges That Result in Corrections >The Census Bureau will issue corrected CQR counts based on the housing >unit and population counts as of April 1, 2010. The governmental units may >use new official census counts for all programs requiring official 2010 >Census data. The Census Bureau will not make corrections to the 2010 >population counts for individual housing units or GQs, or corrections to >the characteristics of the population and housing inventory. The Census >Bureau will modify the decennial file with the CQR corrections for use in >generating the 2012 postcensal estimates. The American FactFinder will >provide the inventory of corrections as errata to the original data. The >Census Bureau will not revise 2010 Census base files, 2010 Census >apportionment counts, redistricting data, or 2010 Census data products. >The Census Bureau will send a letter with a certification of the >population, housing and group quarters counts for all jurisdictions >affected by the results of a CQR challenge. >--------------------- >tinfo/ctpp-news > >_______________________________________________ >ctpp-news mailing list >ctpp-news(a)chrispy.net >http://www.chrispy.net/mailman/listinfo/ctpp-news > > >_______________________________________________ >ctpp-news mailing list >ctpp-news(a)chrispy.net >http://www.chrispy.net/mailman/listinfo/ctpp-news ------------------------------------------------------------------------------------------------- Patricia C. (Patty) Becker 248/354-6520 APB Associates/SEMCC FAX 248/354-6645 28300 Franklin Road Home 248/355-2428 Southfield, MI 48034 pbecker(a)umich.edu

13 years, 9 months

Problem Importing CA PL data

by Anais Schenk

Has anyone else had a problem importing the "cageo2010" file into Access 2003? I keep getting an error message saying that access doesn't recognize or find the database. I followed the instructions in the "0File_Structure" pdf exactly. I got the other two tables imported just fine, but can't seem to get the geo table. Anais Schenk | Planner Direct 831.264.5088 | Fax 831.883.3755 [cid:image001.jpg@01CBDDA9.1A122780]

13 years, 9 months

Rules for 2010 Count Question Resolution Program

by Ed Christopher

Today--the Census Bureau published its final rules concerning the Count Question Resolution (CQR)Program. The CQR Program will address requests for corrections to the 2010 Census count of housing units and/or group quarters (GQs) and associated population, based on three types of challenges (1) boundary, (2) geocoding, and (3) coverage. According to the Notice, the CQR Program is not a mechanism or process to challenge or revise the population counts sent to the President by December 31. http://edocket.access.gpo.gov/2011/2011-5217.htm http://edocket.access.gpo.gov/2011/pdf/2011-5217.pdf -- Ed Christopher FHWA Resource Center Planning Team 4749 Lincoln Mall Drive, Suite 600 Matteson, IL 60443 708-283-3534 (V) 708-574-8131 (C)

13 years, 9 months

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ctpp-news March 2011