CTPP based on 2012 – 2016 ACS is released!

In August 2016, the Census Bureau approved a request for a special tabulation of census data based on the 2012 – 2016 ACS, this will be the next CTPP data set.

What is it?

A special tabulation of Census data designed for transportation uses.

What’s in it?

Custom tables describing residence, workplace and trip from home to work. We will release the link for downloading metadata, tables, and geographies.

When will we have it?

The Census Bureau will generate and deliver the tab after processing their standard products for the relevant years, we should receive the tab in very late 2018 or early 2019.

Why is a year skipped?

The Census Bureau expanded their sample size during 2011, we wanted to take full advantage of that increase.

For more information, please click here.

CTPP based on 2006 – 2010 ACS

Please see below for more information and known issues.

At long last, the CTPP 5 year small area data is (a)live and can be accessed by clicking take me to the data at the following URL: http://ctpp.transportation.org/Pages/5-Year-Data.aspx

A tutorial that shows the software’s functionality is available at CTPP_tutorial_v02

Web tutorials are available at: http://www.youtube.com/user/CTPPProgram

The CTPP 5-year data, based on ACS 2006 – 2010 Census Data, was released Thursday, October 31, 2013, the URL to access the data is shown above.

The CTPP Data Access Software is a powerful tool to access the nearly 350 gigs of data provided by the Census Bureau. The Dataset consists of nearly 200 residence-based tables, 115 workplace-based tables and 39 flow tables (Home to work) for over 200,000 geographies. The data are derived from two American Community Survey microdata recordsets based on the 2006 – 2010 ACS. One set is the original microdata; all tables derived from this set are designated A, the other set is a disclosure proofed microdata set; all tables derived from this set are designated B. That is to say, the first letter in the table name indicates the set from which the table was derived. For more information on disclosure proofing, please access the CTPP e-Learning module “Disclosure Proofing” at http://ctpp.training.transportation.org/

The software contains a robust map tool, for both selecting geography and rendering results. Results can also be presented as various style charts and tables that can be rearranged to suit your analysis and display needs. Data from the tool can be downloaded as comma or semicolon delimited .csv, .xml, .shp, .tab.

Some things to be aware of:

This is a new software release and it is possible you may find some errors and bugs as you use it. Please use the CTPP Feedback form available in the Help menu to report any problems encountered. (Version 1.1 release, already planned for the near future, reflects corrections to issues discovered after Beta testing.) Please consider this a Gamma version.

A PDF tutorial is available in the Help menu and covers much of the software functionality teaching a sample application. The context-sensitive (on-line) help has some bugs that are currently being addressed. A series of short film tutorials is available on the CTPP YouTube channel at http://www.youtube.com/user/CTPPProgram. The YouTube tutorials include a software tour, how to register/login, opening and rearranging a table/accessing basic data; Geography selection by list and map; Calculating percentages; and Display maps and thematic analyses. If, after you have exhausted all resources you are still having trouble please contact pweinberger@aashto.org for a walkthrough, but please try to find your solution from available resources first. Training is rolling out both in person and online, we will keep you posted.

Downloads are limited. If you need to download large tables they will need to be split up and stitched back together in excel (or another program). If you need to download large tables they will need to be split up and stitched back together in excel (or another program). There is a background downloader for large files. In a background downloader for large files. In Iif you simply want all the data for your entire if you simply want all the data for your entire State, send a message to pweinberger@aashto.org and you will be directed to an FTP download. Any very large data set is unsupported and for power users who are comfortable manipulating large data sets in statistical software packages that they are already licensed to use.

Geographies can be aggregated and margins of error will be correctly re-calculated, but non-standard (user created) saved geographies cannot be mapped – we are working on this.