Subcommittee on Census Data for Transportation Planning
Federal Highway Administration
Metropolitan Planning Division and
Office of Highway Information Mgt 
In cooperation with the TRB Subcommittee on Census Data for Transportation Planning
C T P P  Status  Report
February 1998
The Census is Coming!.................The Census is Coming!
Census 2000
2000 Dress Rehearsal
Sampling for Non-Response
Workplace coding 
TAZ Definitions 
2000 CTPP 
Funding          Content 
Journey-To-Work Questions 
Dress Rehearsal Questions
TRB Subcommittee: Message from the Chair
Washington DC Contacts
Census Regional Contacts
CTPP Questionnaire
Census 2000
The annual funding (or "appropriation") for the Bureau of Census is contained in the Commerce, Justice, and State, The Judiciary, and Related Agencies Appropriation bill. The decennial census is funded under the Periodic Censuses and Programs account. Funding was approved in November for Census 2000 Dress Rehearsal testing to be performed at three sites: Sacramento, CA; 11 counties in and around Columbia, SC; and Menominee Reservation in WI. The results of the Dress Rehearsal testing will influence future funding and content of questions asked in the 2000 Census.

On March 31, 1997, the Census Bureau submitted to Congress the topics for questions it will include in the 2000 Census. The proposed form will provide a "short" form in 2000 that is much shorter than the one used in 1990. The proposed short form will include six population subjects, one fewer than in 1990, and one housing subject, four fewer than the last census.

The Census 2000 long form will include 27 more topics than the short form. Only one in six households will receive the long form. The Census Bureau's Journey-To-Work Branch is not expecting any major changes to journey-to-work questions (see Journey-To-Work 2000 article in this report).

The actual wording of the census questions must be submitted to Congress by April 1, 1998. [Top]

2000 Dress Rehearsal
In 1998, the three sites noted above will serve as the final testing locations for Census 2000. The 2000 Dress Rehearsal will provide a census-like environment to simultaneously test new procedures planned for Census 2000 including: new user-friendly forms easily available at many locations; multiple contacts with each household; digital capture of forms; and new statistical estimation techniques. The Dress Rehearsal will also be testing the process of local and tribal government review of address lists for completeness / accuracy and new promotion / outreach programs.

The Dress Rehearsal transportation related questions are listed on page 4 of this report. [Top]

Sampling for Non-Response
There has been a great deal of discussion about sampling. The issue in question concerns not the method of distributing the "long form" but the method of counting the population who, for one reason or another, do not fill out their census questionnaire. One proposal calls for the census to use a sampling and adjusting methodology, while the other calls for trying to find and count each and every individual.

Collectively, the Transportation community has come out in strong support for sampling methodology. During the 2000 Dress Rehearsal, sampling for non-response will be tested at the Sacramento, CA site and the total enumeration method will be used at the Columbia, South Carolina site. At the end of the Dress Rehearsal, the methods will be evaluated and Congress will make the final decision. To help Congress, an eight member Review Board has been assembled.


The capability of utilizing "digital" IMPORT files from MPOs/DOTs by the Census Geography Division has been enhanced in the past year and has improved the timeliness and accuracy of TIGER database updates. In that year, Census Regional Offices have successfully imported numerous digital files, in many formats, from around the country.

The criteria for acceptance of digital MPO / DOT files is: (1) the existence of an accurate address centerline file (with feature names attached and a unique ID#) and (2) linear data and correct topology (i.e. nodes / intersections). Census Regional Offices can accept almost any GIS EXPORT format (e.g. MapInfo, AtlasGIS, CAD, Maptitude, etc), but they work primarily with ArcInfo EXPORT files. The digital files are submitted by the MPOs to their Census Regional Office staff, who, since 1996, have been trained in converting and implementing the data into TIGER. [Top]

Workplace Coding
New since 1990 is the availability and use of U.S. Postal Service files (which deliver Delivery Sequence Points in a database) and Master Address Files (MAFs) to improve TIGER address accuracy. Continuous updates of TIGER from MPOs / DOTs is ongoing. If you have files to submit or questions regarding the process, you should contact your Census Regional Office (see pages 6 and 7 of this report). [Top]

TAZ Definitions
In support of the CTPP for Census 2000, MPOs / State DOTs will be asked to define their TAZs prior to the census. We believe that this will make the tabulation process move faster and the resulting data will be available to the MPOs/DOTs sooner. All participants will be supplied digital files or "paper" maps in late Fall of 1998 to annotate their updated TAZ delineations. Under the latest Census proposal, one copy of TIGER98 (on CDROM) would be submitted to each MPO/DOT for their use in TAZ delineations. The new TAZ digital layer or redlined "paper" maps will then be resubmitted to the Census Bureau by early 1999.

A detailed letter and instructions for this new process will be sent out to all MPOs / DOTs in the next few months. Funding for this effort has not yet been determined. For MPO areas which do not have, or don't want, TAZ boundary delineations, the 2000 Census Tract and Block Group boundaries can be used as area definitions for the 2000 CTPP. [Top 

The Census Bureau's goal is to have electronic access via the Internet to decennial census data through DADS (Data Access and Dissemination System). At present DADS is beginning its second prototype. "DADS97" is the second in a series of three prototypes prior to providing Internet access to Census 2000. It is designed to investigate the ability of emerging Internet technologies to meet census requirements while protecting confidentiality of individual record data.

Environmental Systems Research Institute (ESRI) was selected by the Census Bureau to assist in the development of DADS. ESRI will partner with IBM.

A DADS97 Beta Test was scheduled to take place during February 9 -20, 1998. The Beta test results are an important mechanism for collecting feedback to improve the design and functionality of this prototype.

"Surf's Up" 
Web Sites  to Remember! 

Census Transportation Planning Package (CTPP)
Transportation applications of Census data are significantly different from standard Census applications. While most applications are interested only in residence location, the transportation applications use three geographies: The 1990 Census Transportation Planning Package (CTPP) was a major breakthrough in that there was nationwide coverage, consisting of a Statewide Element and an Urban Element. The Statewide Element had summary tables for geographic units as small as the census "place" (which includes incorporated cities / towns with more than 2,500 people). The Urban Element, on the other hand, had tables for areas defined by the MPOs as Traffic Analysis Zones (TAZs), census tracts or block groups. The basic geography of the 1990 CTPP is shown in Table 1 along with the associated section of the CTPP.
Urban Element
Home Geography
Part A
Part 1
Work Geography
Part B
Part 2
Flow between 
Home and Work
Part C
Part 3
Table 1. CTPP Content

There have been two national conferences to follow-up on the 1990 CTPP. Recommendations from those conferences include:

The major benefits of the 1990 CTPP were seen as:
  • [Top]

  • CTPP Funding
  • In 1990, CTPP data was provided on CD-ROMS to all MPOs/DOTs. This data product was purchased through pooled fund process by the States with the contract administered between AASHTO and the U. S. Census Bureau. Payment was made using "PL" and / or "HPR" funds with the match being waived by USDOT. The Federal Transit Administration (FTA) also allowed "Section 8" and "Section 9" funding to be used. The states of New York and Maryland used HPR money "off the top" so that no prefinancing would be required.

    AASHTO has again offered their services in 2000 CTPP administration, and FHWA is working to expedite the process.  [Top]

    CTPP Content
    Discussions are already underway regarding the 2000 CTPP. At this point it doesn't seem prudent to rely on DADS to access the data that transportation planners need. Therefore, we are operating under the assumption that like 1990 the 2000 CTPP will be CD-ROM based. However, many decisions must be made in the coming months regarding both the content and format of the next CTPP. So we are soliciting input from a broad spectrum of users.

    We want to know what you used from the 1990 CTPP and what you want from a 2000 CTPP product? We are envisioning an integrated package of data and software. Also, it would be helpful to learn what access tools would work best for you, for example, GIS-based, DBF-based, etc.?

    We are in the process of setting up a CTPP Advisory Group as part of the TRB Subcommittee on Census Data for Transportation Planning chaired by Ed Christopher. If interested, write or call Ed.


    The Census Bureau suggests that MPOs and DOTs begin consulting with their local Statistical Areas Program regarding potential changes to census boundaries. Your involvement will help ensure local level consistency between TAZs and census geography.
    We need Your Comments
    Please communicate your comments regarding the CTPP to Tom Mank by July 1, 1998. A brief questionnaire is provided at the end of this report. Either use this page to fax your response, or send Tom an e-mail. 
    E-Mail Addresses Wanted
    If you are interested in receiving future information about census related items relative to the transportation planning community let us know. To be added to our ever-growing list e-mail Tom Mank and let him know. 

    Journey-to-Work 2000
    Place of Work
    No changes anticipated. 
    Means of Transportation
    No changes anticipated. 
    Carpool Occupancy
    Two fewer categories in 2000 (six vs. eight in 1990). The separate 1990 categories of "5 people" and "6 people" are combined into "5 or 6 people" for 2000. The separate 1990 categories of "7 to 9 people" and "10 or more people" are combined into "7 or more people" for 2000. 
    Departure Time
    No changes anticipated. 
    Travel Time
    In 2000 we will capture three digits of travel time, not two digits. Therefore, we will not be constrained to show a maximum travel time of "99 minutes or more", but will be able to tabulate longer travel times more exactly. 
    Vehicles Available
    One fewer category in 2000 (seven vs. eight in 1990). The top category will be "6 or more" in 2000 (vs. "7 or more" in 1990). 

    2000 Dress Rehearsal Questions
    21. At what location did this person work LAST WEEK? If this person worked at more than one location, print where he or she worked most last week.
    a. Address (Number and street)
    (If the exact address is not known, give a description of the location such as the building name or the nearest street or intersection.)

    b. Name of city, town, or post office

    c. Is the work location inside the limits of that city or town?
    [ ] Yes
    [ ] No, outside the city/town limits

    d. Name of county

    e. Name of U.S. State or foreign country

    f. ZIP code ____________________

    22a. How did this person usually get to work LAST WEEK? If this person usually used more than one method of transportation during the trip, mark [X] the box of the one used for most of the distance.
    [ ] Car, truck, or van
    [ ] Bus or trolley bus
    [ ] Streetcar or trolley car
    [ ] Subway or elevated
    [ ] Railroad
    [ ] Ferryboat
    [ ] Taxicab
    [ ] Motorcycle
    [ ] Bicycle
    [ ] Walked
    [ ] Worked at home -- Skip to 27-29
    [ ] Other method

    If "Car, truck, or van" is marked in 22a, go to 22b. Otherwise, skip to 23a.
    b. How many people, including this person, usually rode to work in the car, truck, or van LAST WEEK?
    [ ] Drove alone
    [ ] 2 people
    [ ] 3 people
    [ ] 4 people
    [ ] 5 or 6 people
    [ ] 7 or more people

    23a. What time did this person usually leave home to go to work LAST WEEK?
    [ ] a.m.
    ______ : ______ [ ] p.m.

    b. How many minutes did it usually take this person to get from home to work LAST WEEK?
    _______ Minutes                                                               [Top]

    TRB Subcommittee  "Message from the Chair"
    This is an important time for census data users. During the coming months planners around the country will be striving to stay informed on the Census Bureau's actions as momentum builds for the 2000 Decennial Census. Transportation planners will also be asked to provide input into the development of Census tools and products. The TRB Urban Data Committee recently formed a Subcommittee on Census Data for Transportation Planning to facilitate the involvement of transportation planners in these various activities. I'm honored to have been selected as the subcommittee's first chairman.

    On Monday night, January 12, 1998, the newly formed subcommittee on Census Data for Transportation Planning held its inaugural meeting. The subcommittee is organized under the Urban Data and Information Systems Committee. Ed Limoges of SEMCOG has agreed to serve as the Secretary.

    The meeting was well attended and featured informative presentations and lively discussion. Jay Waite, Assistant Director for the Decennial Censuses, gave the committee an overview of the activities leading to the 2000 Census, while Phil Salopek, Chief of the Journey-to-Work and Migration Branch, reported on the status of the Journey­to­Work (JTW) questions. On the surface, the 2000 Census is shaping up to be similar in content and nature to the 1990 Census. However, there are still some contentious points over methodology.

    Other issues discussed included the questionnaire content, building TAZs, geocoding, the new industrial classification, the 2000 Dress Rehearsal, and the prospects for the local review of high level tabs to help alleviate bad and erroneous data before it gets released.

    There was general agreement that the CTPP CD-ROM type products developed for 1990 were good ones and that steps be taken to identify the content for a 2000 CTPP while putting together a process to pay for it. It was noted that the process used for 1990 provided a good foundation on which to build.

    Continuous Measurement, now called the American Community Survey, was also discussed. It will be completed on a limited basis between 1999 and 2001. Once complete, the transportation planning community will have continuous data to compare with the traditional long form data.

    While the JTW questions proposed for Census 2000 (see page 4 of this report) represent a continued refinement of what the transportation community needs, there are discussions underway focusing beyond the 2000 Census. Issues of concern include: multiple jobs, access modes and trip links. Though we have a lot of work ahead of us in the next few years, I believe our first meeting provided us with a good beginning.

    Anyone with a special interest in the past, present and future census activities is encouraged to participate in the committee. According to TRB procedures, subcommittees do not have a fixed membership and all individuals are encouraged to become part of the process. For more information, please contact me at (312) 793­3467 or by

    Finally, I believe that disseminating information on the use, content, and design of the census and its products is one of the most important functions the committee can serve. Thus I have developed a census subcommittee webpage ( Your comments and suggestions for improving the webpage would be appreciated.

    Ed Christopher

     Contacts in Washington DC
    TRB Committees
    Ed Christopher (Census Subcommittee Chair)   
    PH: 312-793-3467   
    FAX: 312-793-3481 
    Ron Tweedie (State Data Committee Chair)   
    PH: 518-457-1695   
    FAX: 518-457-8317
    Ed Limoges (Census Subcommittee Secretary)   
    PH: 313-961-4266   
    FAX: 313-961-4869
    Census Population Division (JTW questions)
    Phil Salopek   
    PH: 301-457-2454   
    FAX: 301-457-2481 
    Ernest Wilson   
    PH: 301-457-2451   
    FAX: 301-457-2481 
    Census Geography Division (for TAZ update questions)
    Todd Blair   
    PH: 301-457-1099   
    FAX: 301-457-4710 
    Tom Mank (2000 CTPP Status questions)   
    PH: 202-366-4087   
    FAX: 202-366-7660
    Elaine Murakami   
    PH: 202-366-6971   
    FAX: 202-366-7742
    Jerry Everett   
    PH: 202-366-4079   
    FAX: 202-366-3713 
    Phil Fulton   
    PH: 202-366-1793   
    FAX: 202-366-3640 
    Wende O'Neill   
    PH: 202-366-8876   
    FAX: 202-366-3640   

    Census Bureau Regional Office Contacts
    For up-to-date Regional Census Center information go to
    Area Covered
    Alabama, Florida, Georgia Mr. Gene Wallace   
     (404) 730-3955 
    Bureau of the Census   
    101 Marietta St NW   
    Suite 3200   
    Atlanta, GA30303-2700 
    Connecticut, Maine, Massachusetts, New Hampshire, Rhode Island, Vermont, and New York (part-balance not covered by the New York Office); Puerto Rico and the U.S. Virgin Islands.  Ms. Denise Smith   

    Mr. Vincent Pito   
     (617) 424-0513 

    Bureau of the Census   
    2 Copley Place Suite 301 P.O.Box 9108   
    Boston, MA 02117-9108 
    Kentucky, North Carolina, South Carolina, Tennessee, Virginia  Mr. David Wiggins   
     (704) 344-6702
    Bureau of the Census   
    901 Center Park Drive   
    Suite 106   
    Charlotte, NC 28217
    Illinois, Indiana, Wisconsin  Ms. Linda Gray   
     (708) 562-1698 
    Bureau of the Census   
    2255 Enterprise Drive   
    Suite 5501   
    Westchester, IL 60154
    Louisiana, Mississippi, Texas Mr. Ken Harris  

    Mr. Demain Deloney   
     (214) 640-4472 

    Bureau of the Census   
    6303 Harry Hines Blvd   
    Suite 210   
    Dallas, TX 75235-5269
    Arizona, Colorado, Montana, Nebraskaa, Nevada, New Mexico, North Dakota, South Dakota, Utah, Wyoming  Mr. Jim Castagneri   
     (303) 969-7760
    Bureau of the Census   
    6900 W Jefferson Ave   
    Denver, CO 80235-2032 
    Michigan, Ohio, West Virginia Mr. Gordon Rector   
     (313) 259-2605
    Bureau of the Census   
    1395 Brewery Pk Blvd   
    P.O. Box 33405   
    Detroit, MI 48232-5405
    Arkansas, Iowa, Kansas, Minnesota, Missouri, Oklahoma Mr. Mathew Milbrodt   
     (913) 551-6750
    Bureau of the Census   
    Gateway Tower II   
    Suite 600   
    400 State Avenue   
    Kansas City, KS 66101 
    California (part): Fresno, Imperial, Inyo, Kern, King, Los Angeles, Madera, Mariposa, Merced, Monterey, Orange, Riverside, San Benito, San Bernadino, San Diego, San Louis Obispo, Santa Barbara, Tulare, and Ventura Counties; Hawaii; Guam; American Samoa; No. Mariana Is  Mr. Tim McMonagle   
     (818) 904-6364 
    Bureau of the Census   
    15350 Sherman Way   
    Suite 300 Van Nuys   
    CA 91406-4224 
    New York
    New York (part): Bronx, Kings, Nassau, New York, Queens, Richmond, Rockland, Suffolk, Hudson, and Westchester Counties; New Jersey (part): Bergen, Essex, Middlesex, Morris, Passaic, Somerset, Sussex, Union, Warren Counties  Mr. Jonathan Martin   
     (212) 620-4803 
    Bureau of the Census   
    201 Varick Street   
    9th Floor Census Center   
    New York, NY 10014-4826 
    Delaware, District of Columbia, Maryland, New Jersey (part-balance not covered by the New York Office), Pennsylvania  Ms. Vicki Lewis   
     (215) 597-1990
    Bureau of the Census   
    105 South First Floor   
    7th Street   
    Philadelphia, PA 19106
    Alaska, California (part-balance not covered by the Los Angeles Regional Office), Idaho, Oregon, Washington  Mr. Rick Campbell   
     (206) 728-5410   
    Ms. Elena Baranov   
     (206) 728-5309
    Bureau of the Census   
    Suite 500   
    101 Stewart Street   
    Seattle, WA 98101 

    CTPP Questionnaire

    1. What tables did you use from the 1990 CTPP?

    A. Statewide, please list: 

    B. Urban, please list: 

    2. What tables from the 1990 CTPP were of least importance to you?

    A. Statewide, please list: 

    B. Urban, please list: 

    3. What data or tabulations would you like to have available for the 2000 CTPP which were not part of the 1990 CTPP? 

    4. What is the best way for you to access the 2000 CTPP data tables [ASCII, dBASE, Spreadsheet (Excel, Lotus, Quattro Pro), SAS, GIS-based, other - please specify]? 

    5. What GIS software / hardware do you currently use? What GIS format would be best for digital file exchange [ASCII comma delimited, ASCII space delimited, ARC Export files or shapefiles, other GIS data formats (Transcad, MapInfo, Intergraph, etc), CAD dxf]?? 

    6. What is the source of your GIS base map (TIGER, ETAK, other private vendor, created in-house, other)? 

    7. If given the opportunity, would you assign staff and resources to participate in workplace coding for 2000? 

    Please submit questionnaire responses to:
    Tom Mank
    FAX: 202-366-7660
    Phone: 202-366-4087
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