Extreme commuters are defined as workers who travel 90
minutes or more to work, one-way. They usually work in the center of a
metropolitan area, but lives beyond that area, commuting long distances by
air, rail, car, bus, or some combination. According to
U.S. Census Bureau, extreme commuting has been increasing since at least 1990.
On top of the extreme commuters, there are two more groups of commuters who travel as long in terms of duration and distance. They are called long-distance commuters and mega commuters.