(see Figure 5 in text)
| Mean | SE | |
|---|---|---|
| All persons | 4.1 | 0.02 |
| Sex | ||
| Male | 4.1 | 0.02 |
| Female | 4.1 | 0.02 |
| Age | ||
| Less than 5 years | 3.2 | 0.05 |
| 5-14 years | 3.5 | 0.04 |
| 15-19 years | 4.0 | 0.06 |
| 20-24 years | 4.1 | 0.07 |
| 25-54 years | 4.6 | 0.02 |
| 55-64 years | 4.1 | 0.05 |
| 65 years and older | 3.4 | 0.04 |
| Driver status* | ||
| Yes, a driver | 4.5 | 0.02 |
| Not a driver | 2.6 | 0.04 |
| Employment status* | ||
| Employed | 4.5 | 0.02 |
| Not employed | 3.7 | 0.03 |
| Medical condition* | ||
| Medical condition limits travel | 2.8 | 0.06 |
| No medical condition limiting travel | 4.4 | 0.02 |
* Asked of persons age 15 and older.
SOURCE: The 2001 National Household Travel Survey, person file, U.S. Department of Transportation.