Census 2000 Suplementary Survey Data

Subcommittee on Census Data For Transportation Planning

C2SS Transportation Tidbits

The C2SS was a survey of 700K households designed to test the operational feasibility of collecting long form-type data simultaneously, but separately, from a decennial census. The first wave of C2SS data was released at the statewide level in august 2001. Additional data for most cities and counties of 250,000 or more people are scheduled for release in the fall 2001, and winter 2002.

Transportation Related
Power Point Presentation (.ppt)
of the C2SS Data (550K)
by Elaine Murakami and Nanda Srinivasan

Zipped Excel Files with 1990 CTPP Data and the 2000 C2SS Modes to Work by State (14K)
Vehicles Available by State (12K)
Travel Time by State (21K)

A Review of the Journey to Work data findings from the C2SS
by Alan Pisarski
(a zipped msword file, 126K)

County and City Data Profiles

In 2000 the average travel time to work was 24 minutes 20 seconds as compared to 22 minutes 23 seconds in 1990. A change of almost 2 minutes.
In 1990, nine states and the District of Columbia had higher travel times to work than the national average. By 2000, this increased by two states to 11, along with the District of Columbia.
Of the states with higher than average travel times, Hawaii dropped off the list while West Virginia, Washington and New Hampshire were added.
West Virginia had the greatest travel time change at 4 minutes and 26 seconds followed by Georgia (4:14) and New Jersey (3:24).
New York continued to hold the top spot for the longest travel time at 31 minutes 11 seconds followed by Maryland (29:10), New Jersey (28:41), the District of Columbia (28:32) and Illinois (27:02).
The states with the fastest travel times continued to be South and North Dakota at 15 minutes 34 seconds and 15 minutes 24 seconds respectively.
Of the modes used to go to work, driving alone continued to capture the largest market share at 76.3 percent. Carpooling was second at 11.2 percent followed by transit (5 percent), other means (3.8 percent), work at home (3.2 percent) and biking at four tenths of one percent.
In terms of actual numbers, carpooling continued the decline seen in the 1980s with a 7.5 percent drop in the number of trips in 1990. On the other hand, transit trips increased 7.7 percent over the 10-year period (1990 to 2000). The transit increase is consistent with the growth that has been reported by the transit industry.
Overall, Carpooling lost market share shrinking from 13.4 to 11.2 percent of all work trips while Transit stayed about the same with an overall market share of 5 percent.
Athough the sample is small (see notes below), it appears that both bike trips and 'working at home' have increased ...stay tuned as more data becomes available.
For More information and to get your own C2SS data see the Census Bureau's American Factfinder

The 1990 data used here came from STF3 tabulations while the 2000 data came from the Census 2000 Supplementary Survey (C2SS). The C2SS was a survey of 700K households designed to test the operational feasibility of collecting long form-type data simultaneously, but separately, from a decennial census. The first wave of C2SS data was released at the statewide level. Additional data for most cities and counties of 250,000 or more people are scheduled for release in the fall 2001, and winter 2002.

Comparisons to 1990 have some caveats.

Group quarters are not included in the 2000 data.
Travel time was top coded at 99 minutes in 1990 and 240 in 2000 (Census staff notes this affected the national 2000 average travel time by almost 30 seconds).
The points above include work at home as a travel mode when comparing modal market shares.

Note: All estimates include statistical variability. No statistical comparisons of 1990 Census and C2SS estimates taking this variability into account have been made. Back to Home

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