|50-499 Miles||Standard error||500-749 miles||Standard error||750-999 miles||Standard error||1,000-1,499 miles||Standard error||1,500+ miles||Standard error|
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)