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Library: Decoders
   
Decoding Transportation Policy & Practice # 4

Posted 06/13/02

 

   
 
Census Journey-to-Work:
What Do We Know About How Americans Travel? 
 

for a .pdf version of this report, click here  
to download Adobe Acrobat Reader, click here

Text Box: 	Share of Work Trips
	1990	2000
Drive Alone	73.2%	75.7%
Carpool	13.4%	12.2%
Transit	5.3%	4.7%
Walk	3.9%	2.9%
Bicycle	0.41%	0.44%*
Work at Home	3.0%	3.3%
*from the 2000 Census Supplementary Survey.

The first set of transportation figures from the 2000 Census long form – known as the Journey to Work data – give us a glimpse of the travel behavior of people commuting to work.  However, the data is limited and other surveys may present a more complete picture of travel behavior. 

The figures show that the average time it took commuters to get to work was 25.5 minutes – up two minutes from 1990.  They also show that, as more Americans moved to sprawling areas with fewer transportation choices, a greater share of commuters drove alone to work: up from 73.2 percent to 75.7 percent.  Working at home, or telecommuting, made the larg­est gains in modal share, growing from 3.0 to 3.3 percent.  Transit’s share of commute trips declined by 11 percent over the last decade, from 5.3 percent to 4.7 percent.  Walking to work and carpooling also posted declines, with walking dropping from 3.9 percent of work trips to 2.9 percent, and carpooling’s share of work trips declining from 13.4 to 12.2 percent.

While data on bicycling to work is not yet available from the Decennial Census, results from a Census supplemental survey conducted in 2000 show bicycling’s mode share growing 9 percent during the decade.

Why the Census Data Tells Only Part of the Story

The Census Journey to Work (JTW) data is by far the most comprehensive snapshot of commuting in the United States, but it has nothing to say about the 80 percent of trips that are for other purposes.   The Census JTW data does not include infor­mation on shopping trips, school trips, or recreational trips.  All Census data is for a single week in April, and relies on respon­dent judgments of travel time and other factors. In addition, because the Census asks respondents to indicate the mode of transportation they usually take to work, it fails to count people who took transit, bicycled, or walked to work occasionally.  And, where people used more than one mode to get to work (i.e. walking to a transit station), only the mode that com­muters estimated carried them most of the distance is counted.

Some Different Views

Several national-level data sources can provide some insight into what the Census is missing, and give an entirely different view of public transportation, bicycling and walking in the last decade.

The Omnibus Household Survey, a nationwide monthly survey of 1,000 households conducted by the Bureau of Transportation Statistics, collects data on core questions about general travel ex­periences.  The most recent release of the data, in May 2002, shows that when you look beyond work trips, many Americans use more than one way to get around.  While the majority of Americans stick to the same mode day in and day out, almost 40 percent (37.4%) complement their typical means of travel with a differ­ent mode: for example, driving for some trips while bicycling for others. 

As mentioned above, the Census shows that less than 5 percent of commuters take transit as their usual mode to work.  However, the Omnibus survey finds that 14 percent of all Americans reported using transit at least once for some type of trip in the past month.  This figure is artifi­cially low because many areas don’t offer transit (see decoder #3); it climbs to 22 percent when only areas where transit is available are counted.  This is considera­bly higher than the number of Americans who flew on a commercial airline in the past month – just 11 percent. 

Other methods of getting around also show up when occasional and non-work trips are counted: two percent of  Americans rode a bicycle to work or to do errands, and 16 percent walked to work or to do errands.  While by no means an apples-to-apples comparison, the graph above is useful in illustrating the gaps in the Census JTW data.

The Census figures also fail to capture the most recent upward trend in total transit ridership, which counts transit trips for all purposes.  According to the American Public Transportation Association (APTA), ridership figures in 2000 reached their highest levels in over 40 years, only to be surpassed again in 2001.  From 1996 through 2001, public transit experienced six consecutive years of strong ridership growth (22 percent total), a dramatic reversal of ridership declines earlier in the decade. APTA’s ridership figures clearly show that transit is an increasingly important part of the American travel equation. 

 

STPP has created a variety of materials to help transportation professionals, journalists, and advocates interpret the data:

  • A new issue of “Decoding Transportation Policy and Practice” that looks at the limitations of the Census Journey to Work data and provides other statistics that give a fuller picture of travel behavior.
  • Easy-to-use, downloadable Excel documents showing metropolitan area, county, and place-level transportation Census data for each state.      
  • A news release issued on the day the national numbers came out. 
All of this information is available at www.transact.org.

 

 

Sources
For transportation data from the 2000 Census, see STPP’s website 
For general 2000 Census data, click here
Click here for the Census Supplementary Survey 
Click here for the Omnibus Household Survey
For more on transit ridership see STPP’s decoder, “Transit Growing Faster than Driving

 
   
         
   

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