CTPP August 2019

ctpp@listserv.transportation.org

9 participants
11 discussions

[CTPP] ABJ30(1) Call for Posters - CTPP 2012-2016: New Data Analyses and Uses

by Reschovsky

Dear colleagues, The Census Data for Transportation Planning Subcommittee of the Urban Transportation Data and Information Systems Committee, ABJ30(1) invites you to submit posters for a session focusing on CTPP 2012-2016: New Data Analyses and Uses. Abstracts are due on September 5th. More information is below. Call Title CTPP 2012-2016: New Data Analyses and Uses Sponsoring Committee Census Data for Transportation Planning Subcommittee of the Urban Transportation Data and Information Systems Committee, ABJ30(1) Call Description The Census Data for Transportation Planning Subcommittee of the Urban Transportation Data and Information Systems Committee, ABJ30(1) invites you to submit posters for a session focusing on uses of the new CTPP 2012-2016 data. In keeping with the theme of our parent committee, topics focusing on transportation planning and urban data are requested. Posters will be displayed at the TRB Annual Meeting in Washington, DC, January 2020. Authors of the most innovative posters may be invited to present at the subcommittee meeting or have their work displayed on the ABJ30 website. Background New CTPP data was released in March 2019 for the years 2012 to 2016. The Subcommittee is interested in learning how users of the new data are utilizing the data for analysis and visualization. In the past, CTPP data has been used as inputs into travel demand models, for corridor level analysis, and for environmental justice analysis to name just a few uses. Have you noticed an increase in data quality in the latest CTPP package since the Census Bureau increased the ACS sample in 2012? Have the geocoding results affected your ability to do your analysis? While you may still be peeling back the layers of the onion that is CTPP data, what have you found so far? The Subcommittee is interested in learning about what you have discovered in your work with this package. The end product can be a map, graphic, or analytic finding aimed at conveying information to other people or within your organization. This is also an opportunity to share the challenges and lessons learned from digging into a large complex dataset and distilling it into a useful analytic product. Evaluation Criteria Posters must incorporate data from the 2012-2016 CTPP. Additional data sets may be used and include but are not limited to other Census data sets and non-Census data sets. Examples include older CTPP packages, the American Community Survey, NHTS, LEHD, and Decennial Census data and Economic Census data. A broad range of abstracts relating to the topic are welcome. Preference will be given to posters which emphasize the following: * Analysis to solve complex problems * Creative ways to visualize CTPP data * New approaches to analyzing CTPP data * Posters that use demographic data to improve transportation planning * Topics that address applications towards urban areas A session-development panel will review all abstracts to identify those that most effectively demonstrate innovative analysis of CTPP data. The subcommittee hopes to identify posters representing a diverse array of uses and applications. Applicants will be notified in October of their selection. Poster Session Guidelines Those selected for this session will prepare a poster for presentation at the 2020 Annual Meeting in January. Participants are not required to prepare a paper. Each presenter will be provided with a table and a 4' x 8' vertical panel for displaying posters and other materials. An electrical connection will be available at each station. Telephone and internet connections will not be available. TRB's guidelines for poster presenters are not yet available, but it is expected that all guidelines once available should be followed. Presenters are expected to register for the TRB meeting and participate in this session. Presentation teams are welcome. Submission Instructions A special deadline for submittals has been established. Interested candidates should submit an abstract explaining their project and poster concept by 11:59 pm EDT on Thursday, September 5, 2019. The abstract should be no more than a single one-sided page in length (approximately 500 words) and include: * Contact information (name, agency/organization, phone number, email address) * Title of your proposed poster for use in the Annual Meeting agenda * Data sources that your poster will focus on * Explanation of the project, research, or process sets * Any innovative discoveries or lessons learned about the 2012-2016 CTPP data that would be useful to the transportation community * Preliminary description of the information to be conveyed in your poster You are welcome to include links to on-line materials that illustrate the analysis or results described in your abstract but this will not substitute for the information requested in the abstract. The subcommittee will not consider sales presentations for products or services. Abstracts should be in a PDF format and submitted to: Clara Reschovsky Clara.reschovsky(a)dot.gov Include the term "ABJ30(1) Poster Abstract 2020" in the subject line. For More Information Questions about the poster session or the abstract submittal process should be directed to: Clara Reschovsky clara.reschovsky(a)dot.gov 202-366-2857 Kathy Yu kyu(a)nctcog.org 817-608-2343

5 years, 11 months

[CTPP] Fwd: Census Bureau to Host Webinar on Navigating Data.census.gov

by Ed Christopher

In case you haven't seen this. -------- Forwarded Message -------- Subject: Census Bureau to Host Webinar on Navigating Data.census.gov Date: Thu, 29 Aug 2019 09:59:57 -0500 From: U.S. Census Bureau <census(a)subscriptions.census.gov> Reply-To: census(a)subscriptions.census.gov To: edc(a)edthefed.com Census Bureau to Host Webinar on Navigating Data.census.gov Registered United States Census Bureau Logo <http://links.govdelivery.com:80/track?type=click&enid=ZWFzPTEmbXNpZD0mYXVpZ…> *Census Bureau to Host Webinar on Navigating Data.census.gov* *MEDIA ADVISORY:* CB19-130 AUG. 29, 2019 *What:* Discover how to use data.census.gov, the new site to access Census Bureau data. Since American FactFinder will no longer be updated, data.census.gov is now the primary way to access new information from the Census Bureau’s most popular surveys and programs. In this webinar, you will learn how to access tables, maps and profiles using multiple search methods. Discover tips and tricks and learn how to download data, customize your table view and share your results. *When:* Thursday, Sep. 5, 2019, at 2 p.m. EDT *Who: **KaNin Reese* <http://links.govdelivery.com:80/track?type=click&enid=ZWFzPTEmbXNpZD0mYXVpZ…>*,* chief, Dissemination Outreach Branch, U.S. Census Bureau *Access:* The webinar will include a simultaneous audio conference and online presentation. Attendees will be able to ask questions following the presentation. *Audio conference access information* Toll-free number: 888-395-2045 Participant passcode: 4095743 *Online presentation access information* Please log in 10-15 minutes early, as some setup is required. An updated browser is recommended. *WebEx Login Link: **Navigating a New Site for Census Bureau Data* <http://links.govdelivery.com:80/track?type=click&enid=ZWFzPTEmbXNpZD0mYXVpZ…> ### Learn More <http://links.govdelivery.com:80/track?type=click&enid=ZWFzPTEmbXNpZD0mYXVpZ…> Resources for the Media We're here to help you get the most out of our tipsheets, press releases, trainings, and media services. If you have a question, give us a call at 301-763-3030 or contact our Public Information Office at pio(a)census.gov <mailto:pio(a)census.gov>. Daniel Velez Share This <http://links.govdelivery.com:80/track?type=click&enid=ZWFzPTEmbXNpZD0mYXVpZ…> *Stay connected with us!* Join the conversation on social media. facebook <http://links.govdelivery.com:80/track?type=click&enid=ZWFzPTEmbXNpZD0mYXVpZ…>twitter <http://links.govdelivery.com:80/track?type=click&enid=ZWFzPTEmbXNpZD0mYXVpZ…>linkedin <http://links.govdelivery.com:80/track?type=click&enid=ZWFzPTEmbXNpZD0mYXVpZ…>youtube <http://links.govdelivery.com:80/track?type=click&enid=ZWFzPTEmbXNpZD0mYXVpZ…>instagram <http://links.govdelivery.com:80/track?type=click&enid=ZWFzPTEmbXNpZD0mYXVpZ…> SUBSCRIBER SERVICES: Subscriber Settings <http://links.govdelivery.com:80/track?type=click&enid=ZWFzPTEmbXNpZD0mYXVpZ…> | Remove me from All Subscriptions <http://links.govdelivery.com:80/track?type=click&enid=ZWFzPTEmbXNpZD0mYXVpZ…> | Help <http://links.govdelivery.com:80/track?type=click&enid=ZWFzPTEmbXNpZD0mYXVpZ…> ------------------------------------------------------------------------ This is an official email from the U.S. Census Bureau. If you have any questions or comments, please contact us (http://www.census.gov/about/contact-us.html <http://links.govdelivery.com:80/track?type=click&enid=ZWFzPTEmbXNpZD0mYXVpZ…>).

5 years, 11 months

[CTPP] Question about Mode of Transportation by Sex

by Cook

We are beginning work on a report built around CTPP data and are surprised by the lack of material on mode and other characteristics of JTW by sex. Is this material available the CTPP? I know we can get this at a place level from the ACS. We knows that certain crosstabs were avoided in an effort to protect individual identities or reduce data production costs, but are surprised to find that this was one that didn't make the cut, at least for Parts 1 and 2. Cliff Cook Clifford Cook Senior Planning Information Manager Cambridge Community Development Department 344 Broadway, Cambridge, MA. 02139 [cid:image001.png(a)01CF4355.A65408C0] <https://www.facebook.com/CDDat344> [cid:image002.jpg(a)01CF4357.3478C720] <https://twitter.com/cddat344> [cid:image010.jpg(a)01CF4357.3478C720] <http://instagram.com/cddat344> www.cambridgema.gov/CDD<http://www.cambridgema.gov/CDD.aspx> ccook(a)cambridgema.gov<mailto:ccook(a)cambridgema.gov> M: 8:30-8:00 T-Th: 8:30-5:00 F: 8:30-Noon 617/349-4656 617/349-4669 FAX 617/349-4621 TTY

5 years, 11 months

Re: [CTPP] Sign our open letter to Census Bureau leadership about ACS data

by Ed Christopher

Thanks Ben. Sure wish we knew a little more about the whole thing. Last I heard Differential Privacy did not work with sample data. They must have figured that out. Ed Christopher 708-269-5237 > On Aug 15, 2019, at 2:46 PM, Benjamin Gruswitz <bgruswitz(a)dvrpc.org> wrote: > > Apologies, that last email wasn't meant to be directed to this group. > > What I DID want to pass along, if some had not seen it, was this update on the topic of differential privacy. It appears the push back from the IPUMS community and others lead to a Census Bureau decision to delay implementation for the ACS until 2025. > > Ben Gruswitz, AICP | Senior Planner > (Pronouns: he/him) > Office of Long-Range Planning > Delaware Valley Regional Planning Commission > 190 N Independence Mall West, 8th Floor > Philadelphia, PA 19106-1520 > 215.238.2882 | www.dvrpc.org > Subscribe | Facebook | Twitter | Instagram | LinkedIn | YouTube > > > > >> On Thu, Aug 15, 2019 at 3:31 PM Benjamin Gruswitz <bgruswitz(a)dvrpc.org> wrote: >> Thanks, I was so confused. >> >> Ben Gruswitz, AICP | Senior Planner >> (Pronouns: he/him) >> Office of Long-Range Planning >> Delaware Valley Regional Planning Commission >> 190 N Independence Mall West, 8th Floor >> Philadelphia, PA 19106-1520 >> 215.238.2882 | www.dvrpc.org >> Subscribe | Facebook | Twitter | Instagram | LinkedIn | YouTube >> >> >> >> >>> On Thu, May 2, 2019 at 12:51 PM Ed Christopher <edc(a)berwyned.com> wrote: >>> There may be some who are interested in this. I apologize if it has already crossed your desk. >>> >>> -------- Forwarded Message -------- >>> Subject: Sign our open letter to Census Bureau leadership about ACS data >>> Date: Thu, 2 May 2019 16:05:03 +0000 >>> From: Steven Ruggles <ipums(a)umn.edu> >>> Reply-To: Steven Ruggles <ipums(a)umn.edu> >>> To: edc(a)berwyned.com >>> >>> >>> IPUMS Census and Survey Data >>> Is this email not displaying correctly? View it in your browser. >>> >>> Dear IPUMS User, >>> >>> I know many of you have been following developments in Census 2020 and the proposed citizenship questions. Several sessions at the Population Association of America (PAA) covered many aspects of Census 2020 planning and were well-attended with lively discussions. I’m writing to you today about plans for the American Community Survey (ACS). Please join me in asking the Census Bureau to clarify their plans for ACS disclosure avoidance control and dissemination. We want to protect the usability of the important public use data that we all use in our work. >>> >>> Here's the short version: please sign our open letter to the Census Bureau asking for transparency in changes to the ACS. For the long version, please keep reading and visit our webpage on this topic. >>> >>> The Census Bureau is planning an extensive revision of procedures for ensuring the confidentiality of public use data, based on a method known as "differential privacy." The new disclosure avoidance system will rely on injecting noise into the data, and the new procedures may reduce or even eliminate the usability of public use data for many common research and policy applications. For more information, see our recent working paper and forthcoming article. >>> >>> The American Community Survey (ACS) is the single most important statistical source in the social sciences. They generate 9,000 articles a year, and a new paper appears about every hour. If these data become unusable, unreliable or available only through restricted-access environments because of the new confidentiality measures, that would have profound consequences across many areas of demographic, economic, and policy research. >>> >>> Acknowledging the importance of the ACS data, we are seeking clarification and engagement with the research community from the Census Bureau. Our open letter requests: >>> >>> A public timeline for changes to the ACS summary files and microdata. >>> Engagement with the research community in advance of any changes. >>> Public versions of new noise-infused ACS summary files and microdata for 2005-2017 so that researchers can assess their usefulness by replicating existing studies. >>> If you support these requests, please sign our letter. >>> >>> Thank you, >>> >>> Steven Ruggles >>> IPUMS Director >>> Regents Professor of History and Population Studies >>> >>> IPUMS | University of Minnesota >>> Copyright © 2019 University of Minnesota, All rights reserved. >>> >>> Our mailing address is: >>> IPUMS >>> 225 19th Ave South >>> Minneapolis, MN 55455 >>> >>> >>> >>> >>> >>> >>> >>> >>> >>> >>>

5 years, 11 months

Re: [CTPP] Sign our open letter to Census Bureau leadership about ACS data

by Benjamin Gruswitz

Apologies, that last email wasn't meant to be directed to this group. What I DID want to pass along, if some had not seen it, was this update <https://ipums.org/changes-to-census-bureau-data-products> on the topic of differential privacy. It appears the push back from the IPUMS community and others lead to a Census Bureau decision to delay implementation for the ACS until 2025. Ben Gruswitz, AICP | Senior Planner (Pronouns: he/him) Office of Long-Range Planning Delaware Valley Regional Planning Commission 190 N Independence Mall West, 8th Floor Philadelphia, PA 19106-1520 <https://www.google.com/maps/place/Delaware+Valley+Regional+Planning+Commiss…> 215.238.2882 | www.dvrpc.org Subscribe <https://app.e2ma.net/app2/audience/signup/1808352/1403728/> | Facebook <http://www.facebook.com/DVRPC> | Twitter <http://www.twitter.com/DVRPC> | Instagram <http://www.instagram.com/DVRPC> | LinkedIn <http://www.linkedin.com/company/delaware-valley-regional-planning-commission> | YouTube <https://www.youtube.com/channel/UCEU8UI5_iGkVypHP93b5jLA> [image: DVRPC] <https://www.dvrpc.org/> On Thu, Aug 15, 2019 at 3:31 PM Benjamin Gruswitz <bgruswitz(a)dvrpc.org> wrote: > Thanks, I was so confused. > > Ben Gruswitz, AICP | Senior Planner > (Pronouns: he/him) > Office of Long-Range Planning > Delaware Valley Regional Planning Commission > 190 N Independence Mall West, 8th Floor > Philadelphia, PA 19106-1520 > <https://www.google.com/maps/place/Delaware+Valley+Regional+Planning+Commiss…> > 215.238.2882 | www.dvrpc.org > Subscribe <https://app.e2ma.net/app2/audience/signup/1808352/1403728/> | > Facebook <http://www.facebook.com/DVRPC> | Twitter > <http://www.twitter.com/DVRPC> | Instagram > <http://www.instagram.com/DVRPC> | LinkedIn > <http://www.linkedin.com/company/delaware-valley-regional-planning-commission> > | YouTube <https://www.youtube.com/channel/UCEU8UI5_iGkVypHP93b5jLA> > > [image: DVRPC] <https://www.dvrpc.org/> > > > On Thu, May 2, 2019 at 12:51 PM Ed Christopher <edc(a)berwyned.com> wrote: > >> There may be some who are interested in this. I apologize if it has >> already crossed your desk. >> >> -------- Forwarded Message -------- >> Subject: Sign our open letter to Census Bureau leadership about ACS data >> Date: Thu, 2 May 2019 16:05:03 +0000 >> From: Steven Ruggles <ipums(a)umn.edu> <ipums(a)umn.edu> >> Reply-To: Steven Ruggles <ipums(a)umn.edu> <ipums(a)umn.edu> >> To: edc(a)berwyned.com >> >> *IPUMS Census and Survey Data * >> Is this email not displaying correctly? View it in your browser >> <https://ipums.us4.list-manage.com/track/click?u=775cbf39c77535e784cdfd6f9&i…> >> . >> >> Dear IPUMS User, >> >> I know many of you have been following developments in Census 2020 and >> the proposed citizenship questions. Several sessions at the Population >> Association of America (PAA) covered many aspects of Census 2020 planning >> and were well-attended with lively discussions. I’m writing to you today >> about plans for the American Community Survey (ACS). Please join me in >> asking the Census Bureau to clarify their plans for ACS disclosure >> avoidance control and dissemination. We want to protect the usability of >> the important public use data that we all use in our work. >> >> *Here's the short version: please sign our open letter >> <https://ipums.us4.list-manage.com/track/click?u=775cbf39c77535e784cdfd6f9&i…> >> to the Census Bureau asking for transparency in changes to the ACS*. For >> the long version, please keep reading and visit our webpage on this topic >> <https://ipums.us4.list-manage.com/track/click?u=775cbf39c77535e784cdfd6f9&i…> >> . >> >> The Census Bureau is planning an extensive revision of procedures for >> ensuring the confidentiality of public use data, based on a method known as >> "differential privacy." The new disclosure avoidance system will rely on >> injecting noise into the data, and the new procedures may reduce or even >> eliminate the usability of public use data for many common research and >> policy applications. For more information, see our recent working paper >> <https://ipums.us4.list-manage.com/track/click?u=775cbf39c77535e784cdfd6f9&i…> >> and forthcoming article >> <https://ipums.us4.list-manage.com/track/click?u=775cbf39c77535e784cdfd6f9&i…> >> . >> >> The American Community Survey (ACS) is the single most important >> statistical source in the social sciences. They generate 9,000 articles a >> year, and a new paper appears about every hour. If these data become >> unusable, unreliable or available only through restricted-access >> environments because of the new confidentiality measures, that would have >> profound consequences across many areas of demographic, economic, and >> policy research. >> >> Acknowledging the importance of the ACS data, we are seeking >> clarification and engagement with the research community from the Census >> Bureau. Our open letter >> <https://ipums.us4.list-manage.com/track/click?u=775cbf39c77535e784cdfd6f9&i…> >> requests: >> >> 1. A public timeline for changes to the ACS summary files and >> microdata. >> 2. Engagement with the research community in advance of any changes. >> 3. Public versions of new noise-infused ACS summary files and >> microdata for 2005-2017 so that researchers can assess their usefulness by >> replicating existing studies. >> >> If you support these requests, please sign our letter >> <https://ipums.us4.list-manage.com/track/click?u=775cbf39c77535e784cdfd6f9&i…> >> . >> >> Thank you, >> >> Steven Ruggles >> IPUMS Director >> Regents Professor of History and Population Studies >> IPUMS >> <https://ipums.us4.list-manage.com/track/click?u=775cbf39c77535e784cdfd6f9&i…> >> | University of Minnesota >> <https://ipums.us4.list-manage.com/track/click?u=775cbf39c77535e784cdfd6f9&i…> >> >> *Copyright © 2019 University of Minnesota, All rights reserved.* >> >> *Our mailing address is:* >> IPUMS >> 225 19th Ave South >> Minneapolis, MN 55455 >> >> >> >> >> >> >> >> >> >> >>

5 years, 11 months

[CTPP] Fwd: Sign our open letter to Census Bureau leadership about ACS data

by Ed Christopher

There may be some who are interested in this. I apologize if it has already crossed your desk. -------- Forwarded Message -------- Subject: Sign our open letter to Census Bureau leadership about ACS data Date: Thu, 2 May 2019 16:05:03 +0000 From: Steven Ruggles <ipums(a)umn.edu> Reply-To: Steven Ruggles <ipums(a)umn.edu> To: edc(a)berwyned.com IPUMS Census and Survey Data *IPUMS Census and Survey Data * Is this email not displaying correctly? View it in your browser <https://ipums.us4.list-manage.com/track/click?u=775cbf39c77535e784cdfd6f9&i…>. Dear IPUMS User, I know many of you have been following developments in Census 2020 and the proposed citizenship questions. Several sessions at the Population Association of America (PAA) covered many aspects of Census 2020 planning and were well-attended with lively discussions. I’m writing to you today about plans for the American Community Survey (ACS). Please join me in asking the Census Bureau to clarify their plans for ACS disclosure avoidance control and dissemination. We want to protect the usability of the important public use data that we all use in our work. *Here's the short version: please sign our open letter <https://ipums.us4.list-manage.com/track/click?u=775cbf39c77535e784cdfd6f9&i…> to the Census Bureau asking for transparency in changes to the ACS*. For the long version, please keep reading and visit our webpage on this topic <https://ipums.us4.list-manage.com/track/click?u=775cbf39c77535e784cdfd6f9&i…>. The Census Bureau is planning an extensive revision of procedures for ensuring the confidentiality of public use data, based on a method known as "differential privacy." The new disclosure avoidance system will rely on injecting noise into the data, and the new procedures may reduce or even eliminate the usability of public use data for many common research and policy applications. For more information, see our recent working paper <https://ipums.us4.list-manage.com/track/click?u=775cbf39c77535e784cdfd6f9&i…> and forthcoming article <https://ipums.us4.list-manage.com/track/click?u=775cbf39c77535e784cdfd6f9&i…>. The American Community Survey (ACS) is the single most important statistical source in the social sciences. They generate 9,000 articles a year, and a new paper appears about every hour. If these data become unusable, unreliable or available only through restricted-access environments because of the new confidentiality measures, that would have profound consequences across many areas of demographic, economic, and policy research. Acknowledging the importance of the ACS data, we are seeking clarification and engagement with the research community from the Census Bureau. Our open letter <https://ipums.us4.list-manage.com/track/click?u=775cbf39c77535e784cdfd6f9&i…> requests: 1. A public timeline for changes to the ACS summary files and microdata. 2. Engagement with the research community in advance of any changes. 3. Public versions of new noise-infused ACS summary files and microdata for 2005-2017 so that researchers can assess their usefulness by replicating existing studies. If you support these requests, please sign our letter <https://ipums.us4.list-manage.com/track/click?u=775cbf39c77535e784cdfd6f9&i…>. Thank you, Steven Ruggles IPUMS Director Regents Professor of History and Population Studies IPUMS <https://ipums.us4.list-manage.com/track/click?u=775cbf39c77535e784cdfd6f9&i…> | University of Minnesota <https://ipums.us4.list-manage.com/track/click?u=775cbf39c77535e784cdfd6f9&i…> /Copyright © 2019 University of Minnesota, All rights reserved./ *Our mailing address is:* IPUMS 225 19th Ave South Minneapolis, MN 55455

5 years, 11 months

[CTPP] FW: 2012-16 CTPP Question about Counts

by Cook

Dara Thank you for these materials. They are very helpful. After taking a closer look at the CTPP flow tables we are still left with a question about why the components of certain tables do not add up to the table total. For example when we filter for Cambridge, MA as both residence and workplace, the "Total" shown in Table B303100 is 37,500 while the component cells add up to 22,470. This problem appears in all the part 3 tables whose universe is household workers. (We do not see a similar issue in all tables based purely in worker characteristics, regardless of living arrangement. Those seem to consistently sum to 27,725.) Can anyone shed light on why the table components to sum to the sum stated in the table? Thanks Cliff Cook Clifford Cook Senior Planning Information Manager Cambridge Community Development Department 344 Broadway, Cambridge, MA. 02139 [cid:image001.png(a)01CF4355.A65408C0] <https://www.facebook.com/CDDat344> [cid:image002.jpg(a)01CF4357.3478C720] <https://twitter.com/cddat344> [cid:image010.jpg(a)01CF4357.3478C720] <http://instagram.com/cddat344> www.cambridgema.gov/CDD<http://www.cambridgema.gov/CDD.aspx> ccook(a)cambridgema.gov<mailto:ccook(a)cambridgema.gov> M: 8:30-8:00 T-Th: 8:30-5:00 F: 8:30-Noon 617/349-4656 617/349-4669 FAX 617/349-4621 TTY From: Dara Goldberg (DCP) <DGoldberg(a)planning.nyc.gov> Sent: Monday, August 12, 2019 11:13 AM To: Cook, Cliff <ccook(a)cambridgema.gov> Cc: Werner, Bailey <bwerner(a)cambridgema.gov>; Le Zhang (DCP) <LZHANG(a)planning.nyc.gov> Subject: RE: 2012-16 CTPP Question about Counts Hello Cliff, The reason the flows are off is because the CTPP methodology for reporting geographies below the county level has been revised for this release (though AASHTO has yet to release documentation stating such). Missing records for smaller geographies are no longer imputed for Parts 2 and 3, therefore, tracts/places will no longer add to counties, nor will they have complete counts. This has resulted in a "truer" data set, albeit with missing records. Part 1 remains the same (i.e. "complete"), because it represents ACS data at place of residence. I've attached a memo summarizing the challenges with the new release. My colleague Le, who I have CC'd, put together the attached presentation explaining this issue, which we shared with our MPO members a couple of months ago. Le will be presenting this to the CTPP oversight board in Arkansas next week. Unfortunately, there was no documentation released accounting for the methodological change, and we believe transportation planners will rely on the current release to have a "complete" count as the prior releases had. Therefore, this release is not comparable to the prior releases for smaller geographies. In the meantime, we have assumed a proportional allocation to account for missing records (though this of course introduces a bias into the results - also covered in Le's presentation). Hopefully this helps! Happy to answer any questions you might have. Regards, DARA GOLDBERG SENIOR PLANNER | REGIONAL PLANNING DIVISION NYC DEPT. OF CITY PLANNING 120 BROADWAY, 31st FLOOR * NEW YORK, NY 10271 212-720-3312 I DGOLDBERG(a)planning.nyc.gov<mailto:DGOLDBERG(a)planning.nyc.gov> http://www.nyc.gov/planning<https://gcc01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.nyc.go…> From: ctpp-news [mailto:ctpp-news-bounces(a)chrispy.net] On Behalf Of Cook, Cliff Sent: Monday, August 12, 2019 10:58 AM To: ctpp-news(a)chrispy.net<mailto:ctpp-news(a)chrispy.net> Cc: Werner, Bailey <bwerner(a)cambridgema.gov<mailto:bwerner(a)cambridgema.gov>> Subject: [CTPP] 2012-16 CTPP Question about Counts To All We are working to collect information about the resident labor force in Cambridge, Massachusetts. We set the residence as the State-Place of Cambridge city, MA, and the workplace as POW State-Place of Cambridge city, MA. The numbers in the CTPP Flows tables are not adding up as expected. Table A304100 - Total workers (1) (Workers 16 years and over) provides an estimate of 27,725 (MOE 847), whereas Table B303100 - Household income in the past 12 months (2016$) (9) (Workers 16 years and over in households) provides a total estimate of 37,300 (MOE 2,054). Furthermore, when we add up the count of workers in each income bracket in Table B303100 they sum to 22,470. I could understand if the total number of resident workers 16 and older in households was smaller than total workers over 16, but we cannot make sense of how the reverse could be true. It also doesn't explain why the sum of all categories is smaller than the listed total. Could data suppression account for this? That would seem unlikely at the level of a city of our size. Could the results be due to data suppression at smaller geographic levels having a ripple effect on a larger geo? I understand workers with an unclear or imprecise work address are excluded from the flow data. Are these issues a result of that screening or is this a different type of issue? Interestingly, the numbers make sense as expected when we look at the Residence tables for the same geography. Table A102101 - Total workers (1) (Workers 16 years and over) provides an estimate of 61,925 (MOE 1,008) and Table A103100 - Total Workers in households (1) (Workers 16 years and over in households) estimates 54,195 (MOE 1,075). Any help on interpreting our resident labor force stats is appreciated. Cliff Cook Clifford Cook Senior Planning Information Manager Cambridge Community Development Department 344 Broadway, Cambridge, MA. 02139 [cid:image001.png(a)01CF4355.A65408C0] <https://gcc01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.faceb…> [cid:image002.jpg(a)01CF4357.3478C720] <https://gcc01.safelinks.protection.outlook.com/?url=https%3A%2F%2Ftwitter.c…> [cid:image010.jpg(a)01CF4357.3478C720] <https://gcc01.safelinks.protection.outlook.com/?url=http%3A%2F%2Finstagram.…> www.cambridgema.gov/CDD<https://gcc01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.cambri…> ccook(a)cambridgema.gov<mailto:ccook(a)cambridgema.gov> M: 8:30-8:00 T-Th: 8:30-5:00 F: 8:30-Noon 617/349-4656 617/349-4669 FAX 617/349-4621 TTY

5 years, 11 months

Re: [CTPP] 2012 - 2016 Transportation Profiles available Now -Update

by Bob Schwartz

Krishnan, I wanted the Excel or HTML for Indiana County in Pennsylvania but it is not on the list. Do you know why? From: ctpp-news [mailto:ctpp-news-bounces(a)chrispy.net] On Behalf Of Krishnan Viswanathan Sent: Wednesday, August 14, 2019 2:52 PM To: ctpp-news(a)chrispy.net Subject: Re: [CTPP] 2012 - 2016 Transportation Profiles available Now -Update Hello All The 2012-2016 Transportation profiles are available now from the FHWA website here: https://www.fhwa.dot.gov/planning/census_issues/american_community_survey/p… Krishnan On Wed, Jul 17, 2019 at 2:03 PM Krishnan Viswanathan <krisviswanathan(a)gmail.com> wrote: The 2012 - 2016 Transportation Profiles are available from the FHWA website here: https://www.fhwa.dot.gov/planning/census_issues/american_community_survey/p… Thanks, Krishnan -- --

5 years, 11 months

[CTPP] LA Times Census Data Tools

by Krishnan Viswanathan

The LA Times Datadesk has a set of Census data tools that will be useful to members of this list. Available here: https://github.com/datadesk Krishnan

5 years, 11 months

Re: [CTPP] 2012 - 2016 Transportation Profiles available Now - Update

by Krishnan Viswanathan

Hello All The 2012-2016 Transportation profiles are available now from the FHWA website here: https://www.fhwa.dot.gov/planning/census_issues/american_community_survey/p… Krishnan On Wed, Jul 17, 2019 at 2:03 PM Krishnan Viswanathan < krisviswanathan(a)gmail.com> wrote: > The 2012 - 2016 Transportation Profiles are available from the FHWA > website here: > https://www.fhwa.dot.gov/planning/census_issues/american_community_survey/p… > > Thanks, > Krishnan > > > > -- > --

5 years, 11 months

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CTPP August 2019