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Registered TransCAD users in the United States can download the latest CTPP 5-Year 2006-2010 tabulations of tract-level journey-to-work data.
Because the TAZ flow data omit flows to TAZs that do not have resident populations (e.g., TAZs that contain only businesses, industry, etc.), a significant number of journey-to-work data are omitted. Because of this incompleteness in the TAZ level data, Caliper is instead offering two TransCAD matrices with nationwide Census Tract flows. Caliper expects to make the TAZ to TAZ flow data available as soon as it is corrected by the Census Bureau.
The CTPP Tract-Tract Small matrix showing the distribution of
single-driver trips among Louisville area Census
tracts is shown along with a TransCAD map with desire lines
showing the flow from tracts to the CBD tract. A
color theme on the tracts also shows the number of single-driver
trips to the CBD originating within each tract.
The first, CTPP3 Tract-Tract Means7.mtx, has the sample estimate and margin of error fields for the journey to work with seven means of transportation, including total workers:
| Field |
|---|
| Workers 16+ |
| Drove Alone |
| Carpooled |
| Public Trans |
| Bicycle/walked |
| Taxi/motorcycle/other |
| Worked at home |
The second, CTPP3 Tract-Tract Small.mtx, has the sample estimate fields only from the following tables:
| Table Number | Content |
|---|---|
|
A302100 |
Total Workers |
| B302101 | Age of Worker |
| B302102 | Industry |
| A302103 | Means of Transportation |
| B302104 | Time leaving home to go to work |
| B302105 | Minority status |
| B302106 | Travel time to work |
The fields are:
| Field Number | Field Name |
|---|---|
|
A302100_001_EST |
Workers
16+ |
| B302101_002_EST | Age 16-17 |
| B302101_003_EST | Age 18-24 |
| B302101_004_EST | Age 25-44 |
| B302101_005_EST | Age 45-59 |
| B302101_006_EST | Age 60-64 |
| B302101_007_EST | Age 65-74 |
| B302101_008_EST | Age 75+ |
| B302102_002_EST | Ind: Ag/forestry/fish/mine/const/AF |
| B302102_003_EST | Ind: Manufacturing |
| B302102_004_EST | Ind: Wholesale/retail/trans/warehouse |
| B302102_005_EST | Ind: Info/finance/professional |
| B302102_006_EST | Ind: Ed/health/soc services |
| B302102_007_EST | Ind: Art/ent/rec/acc/food |
| B302102_008_EST | Ind: Other services |
| A302103_002_EST | Drove alone |
| A302103_003_EST | 2-person carpool |
| A302103_004_EST | 3-person carpool |
| A302103_005_EST | 4-person carpool |
| A302103_006_EST | 5-or-6-person carpool |
| A302103_007_EST | 7+-person carpool |
| A302103_008_EST | Bus or trolley bus |
| A302103_009_EST | Streetcar or trolley car |
| A302103_010_EST | Subway or elevated |
| A302103_011_EST | Railroad |
| A302103_012_EST | Ferryboat |
| A302103_013_EST | Bicycle |
| A302103_014_EST | Walked |
| A302103_015_EST | Taxicab |
| A302103_016_EST | Motorcycle |
| A302103_017_EST | Other method |
| A302103_018_EST | Worked at home |
| B302104_002_EST | Did not work at home |
| B302104_003_EST | Left for work 5-5:29am |
| B302104_004_EST | Left for work 5:30-5:59am |
| B302104_005_EST | Left for work 6-6:29am |
| B302104_006_EST | Left for work 6:30-6:59am |
| B302104_007_EST | Left for work 7-7:29am |
| B302104_008_EST | Left for work 7:30-7:59am |
| B302104_009_EST | Left for work 8-8:29am |
| B302104_010_EST | Left for work 8:30-8:59am |
| B302104_011_EST | Left for work 9-9:59am |
| B302104_012_EST | Left for work 10-10:59am |
| B302104_013_EST | Left for work 11-11:59am |
| B302104_014_EST | Left for work 12-3:59pm |
| B302104_015_EST | Left for work 4-11:59pm |
| B302104_016_EST | Left for work 12-4:59am |
| B302105_002_EST | White alone, not Hispanic |
| B302105_003_EST | Other than white alone, not Hispanic |
| B302106_003_EST | TT to work <5 min |
| B302106_004_EST | TT to work 5-14 min |
| B302106_005_EST | TT to work 15-19 min |
| B302106_006_EST | TT to work 20-29 min |
| B302106_007_EST | TT to work 30-44 min |
| B302106_008_EST | TT to work 45-59 min |
| B302106_009_EST | TT to work 60-74 min |
| B302106_010_EST | TT to work 75-89 min |
| B302106_011_EST | TT to work 90+ min |
The matrices have the IDs of the Census Tract that are in the ccTract.cdf geographic file that is included with this package. The matrix view (MVW) file for each matrix uses the Tract field in the geographic file to label and sort the matrix.
To download the CTPP tract-level
journey-to-work data:
1. Login to the Caliper User Center.
2. Once you are logged in, go to the Download Center.
3. Click TransCAD Downloads.
4. Click CTPP 5-Year ACS 2006-2010 Tabulation Part 3.
5. Download the Caliper Download Manager program and run the program once it is downloaded.
6. When prompted, enter your serial
number and click OK.
7. Make sure the CTPP 2006-2010
Tract-to-Tract Flow Matrices file is checked and click the Download
button.
Once the download is complete, you can click the "Open Download Folder" link in the Download Manager to see the files on your computer. The download matrices and tract layer will be in a folder called CTPP 2006-2010 Tract-to-Tract Flow Matrices.
8. Close the Download Manager.
