A Little bit about MRCOG NM Rail Runner Express Workforce
Connection Of Central New Mexico (WCCNM) Local Planning Assistance
Agribusiness (EDA) Economic Development District Regional Transit
District (Rio Metro) Rural Transportation Planning Organization
(RTPO) Metropolitan Planning Organization (MPO) MRCOG
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A Little bit about YOU
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Agenda CTPP Basics Whats New with the CTPP? CTPP Parts and
Tables CTPP software and online data access CTPP Resources
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What is the CTPP? A Partnership effort between MPOs, DOT, FTA,
FHWA, AASHTO, TRB and the Census Bureau. Set of special tabulations
collected by the US Census Bureau. Designed by Transportation
Planners for the purposes of Transportation Planning.
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What Makes CTPP Unique? Tabulations at Residence Tabulations at
Workplace Flows between Home and Work Part 1Part 2Part 3 Part 1Part
2 Part 3
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Variables Available TRANSPORTATION Place of Work Means of
Transportation Workers per Vehicle Time Leaving Home Travel Time
Vehicles Available SOCIOECONOMIC Minority Status Age of Worker Sex
of Worker Household Income Poverty Status Occupation & Industry
Class of Worker * Variety of Cross-tabulations available
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Potential Applications Transportation planning: How many people
commute from Belen to Albuquerque? What are some key employment
destinations that may be appropriate for TOD? Travel Model
Validation & Sample Design for travel surveys Employment
Analyses: What are the most common destinations for work commuters?
How do centers compare in terms of worker earnings, ages,
industries? Targeted Analyses: How many workers work at home &
in which industries? How is mode choice impacted by race? Age?
Income? Vehicle Availability Generate Statistics: What is the
average number of workers per vehicle? How many workers are there
per household?
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Data Products American Community Survey Journey-to-Work Data
Characteristics & Flows, 2006 - 2008 (20,000+) Transportation
Profiles, 2005, 2005-2007, 2006- 2010 Characteristics & Flows,
2006 2010 (All Geographies!) Decennial Census Journey-to-Work Data
2000, 1990, 1980, 1970, 1960 Transportation Profiles, 2000 (State
& County)
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Decennial Census vs. ACS: Survey Implementation Frequency
Sample Size Follow up Workers Every 10 years vs. Continuous 1 in 6
hhlds vs. 1 in 40/yr 100% follow up vs. to Temporary vs. full-time
workers
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American Community Survey & CTPP Releases 12 Data
ProductPopulationGeographic Data released in:
ThresholdOptions20062007200820092010201120122013 1-Year
Estimates65,000+ State, County, Place,
PUMA20052006200720082009201020112012 3-Year Estimates20,000+Plus
UAs 2005- 2007 2006- 2008 2007- 2009 2008- 2010 2009- 2011 2010-
2012 5-Year EstimatesAll Areas* Plus Tracts & Block Groups
2005- 2009 2006- 2010 2007- 2011 2008- 2012 Data
ProductPopulationGeographic Data released in:
ThresholdOptions20062007200820092010201120122013 1-Year
Estimates65,000+ State, County, Place,
PUMA20052006200720082009201020112012 3-Year Estimates20,000+Plus
UAs 2005- 2007 2006- 2008 2007- 2009 2008- 2010 2009- 2011 2010-
2012 5-Year EstimatesAll Areas* Plus Tracts & Block Groups
2005- 2009 2006- 2010 2007- 2011 2008- 2012 Worker Flows
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Non-Disclosure Rules US Code Title 13, Section 9 ensures that
no published data can disclose an establishments or individuals
identity Rule #7: Worker flows must have 3 un-weighted cases for
each O-D pair CTPP 2000: 82 percent of tract-to-tract data & 89
percent TAZ-to- TAZ flow data were suppressed ACS 5-yr sample:
about 50 percent of Census 2000 ensuring almost no flow data at TAZ
or Tract level using suppression rules CTPP 2006 2010 uses data
perturbation techniques & iterative proportional fitting, along
with rounding and grouping methods
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Two Sets of Tables Set A: Non-Disclosure proofed microdata
Rounding, cell & table suppression Set B: Disclosure proofed
microdata data perturbation methods applied, suppression rules
lifted When using both, row and column totals wont match for the
same population and geographies NCHRP 08-79 Producing
Transportation Data Products from the ACS that Comply With
Disclosure Rules
http://onlinepubs.trb.org/onlinepubs/nchrp/nchrp_w180.pdf
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Variable Groupings
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Rounding Rules Mode to Work Value Rounding Total352350 (not
355!) Drive Alone212210 Carpool4645 Transit5960 Walk3335 Bike24
Zero = 0 1 7 = 4 8+ = nearest 5th
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Geography Available Residence & Workplace Geography Nation
(US Total) State** State-County State-County-MCD (for 12 MCD
states) State-Place State-PUMA5 Metropolitan Statistical Area
Urbanized Area (Residence Only) State-County-Tract TAD TAZ
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What is a TAZ? Transportation Analysis Zone Delineation process
led by MPOs In general, population is 1,200 or greater Must nest
within counties & TADs
http://www.census.gov/geo/maps-data/data/tiger.html
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What is a TAD? Transportation Analysis District Delineation
process led by MPOs Population must be greater than 20,000 No
nesting criteria, must be composed of whole TAZs.
http://www.census.gov/geo/maps-data/data/tiger.html
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Flow Geography FROM Residence GeographyTO Workplace Geography
State State-County State-County-MCD (for 12 strong MCD
states)State-MCD (for 12 strong MCD states) State-Place
Metropolitan Statistical Area EACH Principal City
State-CountyState-Place State-County-MCD (for 12 strong MCD
states)State-Place State-PUMA5State-Place PUMA5POWPUMA Tract TAD
TAZ (Base) TADTAZ (Base) TAD State-PlaceTAZ (Base) Place
Limitations Universe is often Workers only, 16 and over (no
retirees, students, unemployed) Work Commutes only (no shopping,
school trips, medical, etc.) Census Geography. No address point
data (OnTheMap) Data suppression, rounding, grouping, synthesis
Those darn ACS margins of error!
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A word of caution CTPP 2006 2010 does not currently include
workplace data for TAZs with zero (0) populations. This is being
rectified and a new dataset will be released around January, 2014.
This means that any TAZ which consists solely of a special
generator (i.e., an airport, a shopping mall, a business park etc.)
does not have workplace data or flow to it available. The data IS
available at tract for Tracts with zero (0) population, so you can
do Tract flows.
The ACS compass handbooks
http://www.census.gov/acs/www/guidance_for_data_users/compass_products/
A Compass for Understanding And Using ACS Data Set of user-specific
handbooks Train-the trainer materials E-learning ACS Tutorial
Annotated Presentations
Slide 40
Penelope Weinberger CTPP Program Manager, AASHTO 444 North
Capitol Street NE Suite 249 Washington, DC 20001 202-624-3556
[email protected] http://ctpp.transportation.org Special CTPP
Contacts Brian McKenzie CTPP Program Manager Census Bureau
301-763-2454 [email protected] Liang Long CTPP Technical
Support FHWA 202-366-6971 [email protected]
Slide 41
Kendra Watkins Socioeconomic Program Manager (505) 724-3601
[email protected] Contact Information
Slide 42
Comparison to OnTheMap CTPPOnTheMap Sample survey All Workers
over 16 Only workers at work during the reference week Counts each
worker once TAZ level Data Synthesis Detailed Crosstabs
Administrative Records Covered Workers any age Omits self-employed,
Military & unpaid Counts each job once Block Level Data
Synthesis Limited Socioeconomics