|Travel via long-distance mode (both directions)||Trips via same mode in each direction (percent)||Standard error|
|Total for public transportation modes||92.1||0.01|
NOTES: Only trips in which the transportation mode could be identified in both travel directions are considered.
On this table, differences are measured in columns instead of rows. There is no statistical difference between the percentage of air and bus trips that return via the same mode. There is also no statistical difference between the percentage of bus, train and other mode trips that return via the same mode.
Underlined estimates are based on a small sample size (<30) or a coefficient of variation greater than 30% and are not reliable.
SOURCE: U.S. Department of Transportation, Research and Innovative Technology Administration, Bureau of Transportation Statistics, Federal Highway Administration, National Household Travel Survey, long-distance file, 2001 (Washington, DC)