NOTES: Only trips in which the
transportation mode and trip distance could be identified are included. Therefore mode totals in this table differ
from those in other tables.
Underlined estimates are based on a small sample size (<30) or a
coefficient of variation greater than 30% and are not reliable.
On
this table, differences are measured in columns instead of rows. The
difference between shaded cells in the same column are not statistically
significant, except for 500-749 mile distance bus and other are statistically
diferent.
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)
