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

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! 2

History of CTPP Buyers/UsersDirect CostTables 1960 OMB ??? 1970 Individual contracts (112) $0.6 M Individual contracts (152) $2.0 M Nationwide covering all States and MPOs $2.5 M $3.0 M203 today$5.8 M200*

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 4

CTPP Program Activities and Costs Develop specialized data products63% Conduct research, training and outreach21% Manage the program3% Unallocated balance12% Total Program Costs$5,844,332 5-Year Program: 2008 ~

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

CTPP Accomplishments To Date State, Local and County Profiles for 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

Products and Things

3-year CTPP Data Product CTPP 3-Year September 2010 Oct/Nov , 2007, ,000 Pop. Areas (County, Place, PUMAs) Actual Flows _______________

The 3-year Product Design 2000 Geography MSA – EACH Principal City Metropolitan Statistical Area State-POW PUMA State-PUMA State-Place State-County-MCD State-County Nation (US Total) 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 State

3-year CTPP Product Summary HighlightsLow Lights Based on CTPP2000 Tables Many NEW Univariate Tables More Age Tables Streamlined Race Tables More HH and HH Lifecycle Tables More English Proficiency Tables Way more Flows Tables Incomplete Coverage Rounded Reduced Number of Crosstabs with Mode -- Travel time -- Household income -- Vehicle availability -- Age -- Time leaving home Tables will have Suppression -- Means based on 3 values -- 3 records in Flow MOEs

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

Significance Testing--Why do it? MOE, MOE, MOE Source: CTPP Data Profiles

A Compass for Understanding And Using ACS Data  Set of user-specific handbooks  Train-the trainer materials  E-learning ACS Tutorial Working with ACS

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

Collapsing 3 unweighted records for each Mode A word about Collapsing

CTPP products collapsing schema

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

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

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.

Products and Things

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

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.

“NEW” TAZs Traffic Analysis Zones 0Delineation%20Business%20Rules_CTPP%20Final.pdf 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 TAZ Traffic Analysis Zone Traditional Size TAD Traffic Analysis District 20,000 population

Products and Things

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

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

How many PUMAs should this area have? City of Chicago 2000 PUMAs 2,896,016 (2000 Pop) 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? - S ummer Criteria out Spring 2010

Products and Things

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

Cell Means and aggregates require 3 unweighted records DRB rules for the CTPP 5-year tab 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.

5-year CTPP Data Product NCHRP ($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 ACS for the 5-year CTPP (delivery to software vendor in summer 2012)

CTPP Oversight Board 17 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

CTPP Oversight Board Ex-Officio Members 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 AASHTO Census Data Work Group With 30+ Members CTPP Federal Technical Advisory Group TRB Subcommittees– List Serve (830 Members) & Quarterly Newsletters 34

CTPP Key Contacts Penelope Weinberger AASHTO CTPP Program Manager Brian McKenzie Census Bureau JTW & Migration Statistics