ctpp-news January 2011

ctpp-news@mailman.chrispy.net

40 participants
24 discussions

How to Combine Median Values for Mutliple Areas

by Cook, Cliff

I am looking for guidance on how to combine median income values for several census tracts into a single value and associated margin of error. I recall seeing something about this topic in an ACS document but cannot locate the information at this time. Any help would be appreciated. Cliff Cook ----------------------------------------------------------------------------- Clifford Cook Planning Information Manager Cambridge Community Development Dept. 344 Broadway Cambridge, MA. 02139 617/349-4656 FAX 617/349-4669 TTY 617/349-4621 email => ccook(a)cambridgema.gov web site => <http://www.cambridgema.gov/~CDD/>

13 years, 9 months

2000 and 2006-08 work trip comparison question.

by Seidensticker, Dan

We downloaded the2006-2008 ACS county-to-county worker flow for Dane County, Wisconsin from http://ctpp.transportation.org/Pages/3yrdas.aspx. The question we now have...can that data be compared to the county-to-county 2000 CTPP work trips to determine any statistically significant increase/decrease? If so, how would one calculate the margin of error? Dan Seidensticker GIS Specialist Madison Area Transportation Planning Board: A Metropolitan Planning Organization (MPO) City of Madison Planning Unit 121 S. Pinckney Street, Suite 400 Madison, WI 53703 Voice: 608-266-9119 Fax: 608-261-9967 Email: dseidensticker(a)cityofmadison.com<mailto:dseidensticker@cityofmadison.com> www.MadisonAreaMPO.org<http://www.madisonareampo.org/>

13 years, 9 months

TAZ software training: WEB ONLY scheduled for Friday, Feb 25 and Monday, Feb 28

by Elaine.Murakami＠dot.gov

As you know, TAZ delineation by State DOTs and MPOs will occur very soon, with software distribution in March/early April and files returned to the CB by mid-July. The software is being tested by volunteer State DOTs and MPOs starting from Friday, Jan 14 thru Feb 2. Thank you to all the volunteers! We do not need any additional software testers. We have two web training events scheduled. REGISTRATION IS REQUIRED. Please make sure that you capture the full http:// address, in case the listserv breaks it up. You need the address including webconfid=22433, or webconfid=21975 I have reserved 300 spaces for each day, so there should be enough room for everyone. If you are unavailable on those days, the sessions will be recorded and available for later viewing. The same training will occur on each day, so please sign up for only one. The web meeting software has been upgraded, therefore, the email with the confirmation of your registration will have a link to check the functionality on your computer. Friday, 2/25/2011, from 10 a.m. - noon EASTERN: Registration URL: https://www.nhi.fhwa.dot.gov/resources/webconference/web_conf_learner_re g.aspx?webconfid=22433 Monday, 2/28/2011, from 2 - 4 p.m. EASTERN: Registration URL: https://www.nhi.fhwa.dot.gov/resources/webconference/web_conf_learner_re g.aspx?webconfid=21975 Question: why is the time to do this only 3 months? Answer: For the TAZ and TAD delineation, it is important to be able to use the TIGER files with the 2010 geography and 2010 population counts. The 2010 population counts will be released to the public on a flow basis starting in March 2011, so we have to wait until these data are available to begin TAZ and TAD delineation. If the 5-year CTPP using 2006-2010 ACS records will be tabulated for TAZs and TADs, the TAZ and TAD delineations need to be completed quickly and returned to the CB Geography Division (GEO) 3 months after the agencies receive their files (no later than July 2011). This provides GEO with sufficient time to QC the submissions, produce the necessary files so that ACS records will get TAZ/TAD identifiers, and create TIGER/Line shapefiles for TAZ/TAD geography. If the TAZs and TADs are not delineated within this time frame, the CTPP tabulation could be delayed for another year, that is, Fall 2013. Question: are there strict thresholds on either residential population or workplace population? Answer: No. The software will give a warning message, but will still allow you to define TAZs below the recommended "threshold." (The FAQ will include more discussion about this topic.) We are working on an FAQ document on TAZs and will post it on the AASHTO CTPP page. http://ctpp.transportation.org/Pages/taz.aspx Elaine Murakami FHWA Office of Planning 206-220-4460

13 years, 9 months

CTPP Data Access Software up and running

by Weinberger, Penelope

Hi All, It looks like the CTPP Data Access Software is up and running at: http://ctpp.transportation.org/Pages/3yrdas.aspx Thanks for your patience and please let me know if you have any new problems. Penelope

13 years, 9 months

RE: [CTPP] Please help your data community re: PUMAs

by Patty Becker

In Michigan, and I'm sure in many other states, MPOs are SDC affilates. They should automatically be included in PUMA delineation. Patty Becker At 07:17 PM 1/19/2011, you wrote: >I am getting anecdotal remarks about whether or not SDCs have been >open to working with the transportation data community, e.g. State >DOTs and MPOs, about PUMA delineation. I think that if a few of you >could provide some EXAMPLES of GOOD working relationships, maybe we >can reduce the problems in the next round. > >Some questions to consider: >After 2000, how did the SDC do outreach with the data community to >get input into PUMA delineation? >What are the SDCs' plans for outreach for the next round? >Has the MPO or the State DOT participated in the SDC program as an >affiliate? >Did the transportation data community participate in the 2010 Census >tract delineation? > >State's Data Center contact list: >http://www.census.gov/sdc/network.html > >You don't have to write a book, just a couple of paragraphs would >still be helpful! > >Elaine Murakami >FHWA Office of Planning >206-220-4460 > > >_______________________________________________ >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

CTPP data product based on 2006 - 2008 3-year American Community Survey (ACS) Data Access Software LAUNCHED

by Weinberger, Penelope

Hi All, The link below will take you to a page to click through to the new CTPP data product based on 2006 - 2008 3-year American Community Survey (ACS) Data Access Software. It is live and ready to go. http://ctpp.transportation.org/Pages/3yrdas.aspx The CTPP data product based on 2006 - 2008 3-year American Community Survey (ACS) Data is designed to help transportation analysts and planners understand where people are commuting to and from, and how they get there. The information is organized by where workers live, where they work, and by the flow between those places. The link below will take you to the CTPP data product based on 2006 - 2008 3-year ACS Data. The Data Product is a special tabulation of census data designed by transportation planners, for transportation planners. The Data Product contains commuter flows, not available in other data sets. This Data Product is limited to geographies with populations 20,000 or greater. It contains over 200 tabs and cross tabs. 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

FW: [CTPP] Please help your data community re: PUMAs

by Elaine.Murakami＠dot.gov

From: Marie Bousfield [mailto:mbousfield@rcn.com] Sent: Thursday, January 20, 2011 10:34 AM To: Murakami, Elaine (FHWA) Subject: RE: [CTPP] Please help your data community re: PUMAs Hi Elaine, I defined the pumas by myself and gave the definitions to Sue Ebetsch (SDC) and to Cats for their comments. No changes were proposed. Sue had prepared a file layout so she could paste Chicago into her Illinois file. There are some census tracts that are split by the city boundary. I have forgotten if pumas allow partial census tracts. I kept the same puma boundary definitions that were used in 1970, 1980, and 1990 because for me it was important to have: 1. No change over time so that one can calculate change. 2. That the pumas observe existing smaller geographies such as neighborhoods and community areas. 3. For statistical reasons, that the pumas be as homogeneous as possible. The pumas were important for preparing the 2030 forecasts. Max Dieber from the Northeastern Illinois Planning Commission prepared the forecast and used among other things a socio economic model. He used the pumas for the geographic unit. Pumas were just the right size, not too small and not too big and they came with consistent data. I foresee that the CTPP and the pumas will be more important in 2010 than before because economic development has become so much more important. Marie -----Original Message----- From: ctpp-news-bounces(a)chrispy.net [mailto:ctpp-news-bounces@chrispy.net] On Behalf Of Marie Bousfield Sent: Thursday, January 20, 2011 7:26 AM To: ctpp-news(a)chrispy.net Subject: RE: [CTPP] Please help your data community re: PUMAs The use of puma level data differs greatly for rural areas where several counties are needed to make a puma to central cities that include several pumas. As a demographer for the City of Chicago, I used puma data regularly. Some years, a regional transportation agency (CATS) defined the pumas but in 2000 I did it. I felt that it was too important to the City’s planning department to leave this function to transportation planners. The SDC coordinator, Sue Ebetsch, was very helpful. All I want to say is that more than transportation planners have a stake in the puma definitions. Thanks for keeping the CTPP listserv public. Marie Bousfield Retired but still reading your emails -----Original Message----- From: ctpp-news-bounces(a)chrispy.net [mailto:ctpp-news-bounces@chrispy.net] On Behalf Of Elaine.Murakami(a)dot.gov Sent: Wednesday, January 19, 2011 6:17 PM To: ctpp-news(a)chrispy.net Subject: RE: [CTPP] Please help your data community re: PUMAs I am getting anecdotal remarks about whether or not SDCs have been open to working with the transportation data community, e.g. State DOTs and MPOs, about PUMA delineation. I think that if a few of you could provide some EXAMPLES of GOOD working relationships, maybe we can reduce the problems in the next round. Some questions to consider: After 2000, how did the SDC do outreach with the data community to get input into PUMA delineation? What are the SDCs' plans for outreach for the next round? Has the MPO or the State DOT participated in the SDC program as an affiliate? Did the transportation data community participate in the 2010 Census tract delineation? State's Data Center contact list: http://www.census.gov/sdc/network.html You don't have to write a book, just a couple of paragraphs would still be helpful! Elaine Murakami FHWA Office of Planning 206-220-4460

13 years, 9 months

Census Bureau 2010 TIGER files

by Elaine.Murakami＠dot.gov

If you are interested in the TIGER files that will include the 2010 Census tracts and blocks, please go to this page: http://www.census.gov/geo/www/tiger/tgrshp2010/tgrshp2010.html Elaine Murakami FHWA Office of Planning 206-220-4460

13 years, 9 months

Latest Newsletter (Status Report)

by Ed Christopher

The January 2011 issue of the "Status Report" is now hitting the streets. It is available at http://www.trbcensus.com/newsltr/sr0111.pdf and very soon will be at http://www.fhwa.dot.gov/ctpp/status.htm In this issue learn about the TAZ Delineation process, get an update from AASHTO on the CTPP program, read articles on Commutation Flows and Improving Employment Data for Transportation Planning and review the Data Products Schedule. For those with questions about the upcoming TAZ Delineation process make sure to register and attend one of two webinars. --Friday, February 25, 2011, from 10 a.m. to noon EASTERN Registration Link https://www.nhi.fhwa.dot.gov/resources/webconference/web_conf_learner_reg.a… --Monday, February 28, 2011, from from 2 p.m. to 4 p.m. EASTERN Registration Link https://www.nhi.fhwa.dot.gov/resources/webconference/web_conf_learner_reg.a… -- 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

TAZ Training Workshops in February

by Ed Christopher

This is a follow up to Elaine's email. Will you be responsible for creating the TAZs and/or the "new" Traffic Analysis Districts for the 5-year CTPP data in your state or MPO? Will you need to know the process or be managing a TAZ/TAD delineation effort? If the answer to any of these questions is yes, then you will certainly want to register and attend one of two repeat webinars that will be held at the end of February. --Friday, February 25, 2011, from 10 a.m. to noon EASTERN Registration Link https://www.nhi.fhwa.dot.gov/resources/webconference/web_conf_learner_reg.a… --Monday, February 28, 2011, from from 2 p.m. to 4 p.m. EASTERN Registration Link https://www.nhi.fhwa.dot.gov/resources/webconference/web_conf_learner_reg.a… The Webinars will feature a discussion of the Census Data TAZs/TADs, the delineation rules and time line. There will also be a demonstration by Census Bureau staff of the delineation software that MPOs and States will be using coupled with ample time for Q and A. The webinars will both be recorded and posted on the AASHTO CTPP website at http://ctpp.transportation.org If you are having troubling registering you can email either Elaine Murakami (Elaine.Murakami(a)dot.gov) or me and we will try to help. Remember that registration is mandatory and make sure to include the entire link when going to the registration website. -- 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

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ctpp-news January 2011