A goal of the program is to encourage transportation methods that reduce traffic congestion. Even given the relative size of a motorcycle to a car, they are still a vehicle using our roadways. We believe that the best way to encourage people to use fewer vehicles overall is to encourage walking, biking, ridesharing, or riding the bus or train. Another goal of the program is to reduce air pollution. According to the EPA, current motorcycle engines pollute at a rate 90 times higher per mile than passenger cars or even a large sport utility vehicle. More information on this issue may be found through the Environmental Protection Agency's website. A motorcycle qualifies as a carpool only if more than one person is riding the same cycle.