Mobility is a matter of serious concern in Auroville. The main means of transport is the individually owned petrol-based two-wheeler, and, increasingly, a petrol or diesel car. During the guest season, the number of vehicles increases almost threefold. Since most roads are unpaved, motorcycles raise a lot of dust, which affects the health of residents, visitors, animals, and plants. That, and the noise and the speed with which people travel, create an environment which is the opposite of what Auroville should aspire for.