Source: US DOT, FHWA (2017) National Household Travel Survey.
There are mobility gaps according to age and gender. The peak mobility age is around 40 years when individuals tend to be in their most productive years and fully employed. Males tend to travel further than females, a gap that can be linked to vocational differences as well as a more conventional role assumed by women in several households. This gap is however less acute among younger age groups where women travel longer distances than men during their college years.