Research about the usage of environmentally friendly means of transport and the motives for the choice of vehicle exist. However, gender related aspects are not considered. The following hypothesis, accompanied with data from the Microcensus and other sources, form the basis for outlining gender differences in travel behaviour and to determine the demand for in-depth gender studies:

1. Women use environmentally friendly means of transport more frequently, either because they do not have a car at their disposal or because they do not have a drivers license (mobility constraints). Men choose environmentally friendly means of transport consciously.
2. Environmentally friendly means on transports are only used as long as women and men live in the city and don't have any children. Once they move to the country they change their travel patterns in favour of motorized private transport or restrict their mobility. This change is not primarily related to gender but to the new role within the family.
3. Men don't change their travel patterns according to the time of day. Women use environmentally friendly means of transport during the day, but in the evenings they use the car or stay at home. This is because of a lower subjective feeling of safety and not because of the travel purpose or the disposal of a car.