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)
