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Census Transportation Planning Products (CTPP) Penelope Weinberger CTPP Program Manager - AASHTO

Census Transportation Planning Products (CTPP) Penelope Weinberger CTPP Program Manager - AASHTO. Oregon SDC Meeting (November 4, 2010). What is the CTPP Program Today?.

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Census Transportation Planning Products (CTPP) Penelope Weinberger CTPP Program Manager - AASHTO

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  1. Census Transportation Planning Products (CTPP)Penelope Weinberger CTPP Program Manager - AASHTO Oregon SDC Meeting (November 4, 2010)

  2. What is the CTPP Program Today? The CTPP is an umbrella program of data products, custom tabulations, training, technical assistance, and research for the transportation community.  CTPP uses American Community Survey (ACS) data from U.S. Census Bureau.   WARNING! Decennial Census has no Long Form – No JTW data in Decennial Census!

  3. History of CTPP

  4. CTPP Then and Now CTPPackage CTPProducts Program The CTPP program now includes: • Data products • Training and technical assistance • On-call user support • Training classes and web seminars • Research • Integration of data sources • Disclosure avoidance

  5. CTPP Program Activities and Costs 5-Year Program: 2008 ~ 2012

  6. CTPP Basics Planning Support for over 20 federal planning requirements Data for supporting a wide variety of transportation planning tasks Policy studies Travel demand modeling Congestion management Emergency preparedness Corridor and project studies Transit new start and service planning Environmental justice studies Air quality conformity Environmental justice reviews Trends analyses

  7. CTPP Accomplishments To Date State, Local and County Profiles for 2005-2007 are completed and posted at the AASHTO website CTPP based on 3-Year ACS list finalized and Special Tabulations delivered to FHWA and AASHTO in late June/early July, with web-based delivery to practitioners expected October/November 2010 Data access software development underway – Beta testing in November– Final in December Plans for a TRB Census Conference in fall 2011 are underway CTPP based on 5-Year ACS (2006 – 2010) table list developed as part of NCHRP 8-79 Disclosure Proofing Research Project

  8. Products and Things

  9. 3-year CTPP Data Product CTPP 3-Year September 2010 Oct/Nov 2010 2006, 2007, 2008 20,000 Pop. Areas (County, Place, PUMAs) Actual Flows _______________ http://trbcensus.com/products

  10. 2000 Geography Product Structure 3-Parts Part 1-Place of Residence Part 2-Place of Work Part 3-Flows between Home and Work with On-Line Extraction Software Nation (US Total) State State-County State-County-MCD State-Place State-PUMA State-POW PUMA Metropolitan Statistical Area MSA – EACH Principal City The 3-year Product Design http://ctpp.transportation.org/Documents/CTPP_custom_tabulations_based_on_3yracs2006_2008.xls

  11. 3-year CTPP Product Summary

  12. Some Issues to be aware of 3-year ACS (2006, 2007, 2008) What year is the data? Period Estimate brought forward to year of release What Data to use? Reliability vs. Currency

  13. Significance Testing--Why do it? MOE, MOE, MOE Source: CTPP Data Profiles http://ctpp.transportation.org/Pages/overview.aspx http://www.edthefed.com/presentations/significance%20testing.ppt

  14. Working with ACS A Compass for Understanding And Using ACS Data l Set of user-specific handbooks l Train-the trainer materials l E-learning ACS Tutorial http://www.census.gov/acs/www/UseData/Compass/compass_series.html

  15. Quick Overview of ACS • Period Estimate, not Point in Time • ~ 1 in 9 sample for 5-year data • Household based • Collected monthly and accumulated • One year • Data released for areas 65,000 or greater • Three Year • Data released for areas 20,000 or greater • Five Year • Data released for All Geographies • Subject to Disclosure Rules, of course

  16. A word about Collapsing 3 unweighted records for each Mode Collapsing

  17. CTPP products collapsing schema

  18. Accessing the 3-year data All available on a single easy-to-use free website Free to use, but you do need to register Online help and tutorials help users along the way Create “sessions”, which are groups of tables with a common geography selection Select geography using a map and/or drill down through the geographic hierarchy Search for tables by dimension name or any relevant word Either within one of the parts or across all parts

  19. Viewing the data Open any table, either in your “session” or from the public view. From there, you can customize your view of the data: Rearrange dimensions Make selections on any dimension View charts View the data on a thematic map Aggregate items using standard functions or provide a formula (margin of error will be recalculated for you for simpler formulas) Save your report for future use Save your selections and aggregations for use in other tables

  20. Exporting the Data Once you have set up the table you want to see, you can export it: Export the data in CSV, XLS or Beyond 20/20 (IVT) format for use in your own analysis tools Export SHP files for viewing maps in your own GIS engine Entire “sessions” can be exported in a single operation.

  21. Products and Things

  22. TAZ Software being developed by Caliper at CB TAZ Delineation Business Rules

  23. TAZ Size • The Census Bureau recommends • approximately 600 persons • This minimum corresponds to the minimum threshold allowable for 2010 Census block groups. • threshold is guideline not a requirement. • Base TAZ may be defined with fewer than 600 residents or workers • as a general rule, data reliability and availability improves as population size or number of workers increases.

  24. “NEW” TAZs Traffic Analysis Zones • Developed in Summer 2011 • TAZs will nest with TADs • GIS equivalency process • Funded under Consolidated Purchase • FHWA is contacting state DOTs to set up contacts http://download.ctpp.transportation.org/TAZ_Rules/TAZ%20Delineation%20Business%20Rules_CTPP%20Final.pdf

  25. Products and Things

  26. Chicago Why are PUMAs Important? NE Illinois (2008 pop estimate) Let’s Look at Annual Data • Annual Data • 65K+ • Note the areas in gray • We call this Swiss Cheese

  27. Why are PUMAs Important? NE Illinois (PUMAs) Tabulation Area for ACS • Represent 100K • Complete Coverage • Smaller than Counties • NO Swiss Cheese

  28. How many PUMAs should this area have? City of Chicago 2000 PUMAs Why are PUMAs Important? - Defines areas for analysis - Tabulation Area for ACS Who Defines Them? - The Community - Led by State Data Center When are They Defined? - Summer 2011 - Criteria out Spring 2010 2,896,016 (2000 Pop) http://www.census.gov/geo/www/maps/puma5pct.htm

  29. Products and Things

  30. 5-year CTPP Data Product New Geography Requires implementation of new disclosure avoidance (“masking”) techniques

  31. DRB rules for the CTPP 5-year tab • Cell Means and aggregates require 3 unweighted records • For Pt 3 Flow Tables: 3 unweighted records for each table, each cell, with the exception of the 1-way Means of Trans. table • 3 unweighted records for the marginal's in any cross-tabulation with Means of Trans.

  32. 5-year CTPP Data Product NCHRP 08-79 ($550K) Producing Transportation Data Products from the ACS that Comply With Disclosure Rules • NCHRP is funded by State DOTs SP&R • Project schedule: Jan 2010-July 2011 • Fast-track with final report due in July 2011 • Need results to be applied to 2006-2010 ACS for the 5-year CTPP (delivery to software vendor in summer 2012) • http://rip.trb.org/browse/dproject.asp?n=22349

  33. CTPP Oversight Board17 Voting Members – 9 States, 8 MPOs 10 Ex-Officio Members Jennifer Finch, Chair, CO Jonette Kreideweis, Vice Chair, MN Laine Heltebridle, PA Nathan Erlbaum, NY Hui Wei Shen, FL Paul Agnello, VA Phillip Mescher, IA Ahmad Jaber, UT Ayalew Adamu, CA Kuo-Ann Chiao, NYMTC Mell Henderson, MARC Arash Mirzaei, NCTCOG Guy Rousseau, ARC Clara Reschovsky, MWCOG Pete Swensson, TRPC Vacancy* Penelope Weinberger, AASHTO, CTPP Program Manager 33

  34. CTPP Oversight BoardEx-Officio Members AASHTO Census Data Work Group With 30+ Members CTPP Federal Technical Advisory Group TRB Subcommittees– List Serve (830 Members) & Quarterly Newsletters Ed Christopher, FHWA Alison Fields, Census Bureau Rich Denbow, AMPO Elaine Murakami, FHWA Melanie Rapino, Census Bureau Erika Young, NARC Alan Pisarski, Consultant Steven Polzin, USF. CUTR Nanda Srinivasan, TRB Ken Cervenka, FTA 34

  35. CTPP Key Contacts http://ctpp.transportation.org • Penelope WeinbergerAASHTO CTPP Program Manager202-624-3556pweinberger@aashto.org • Brian McKenzieCensus BureauJTW & Migration Statistics 301-763-6532brian.mckenzie@census.gov 35

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