Pre-adolescence is a crucial age where young individuals are in-between. The child is no longer young, but the teenager is not old enough to have the independence and the freedom to get around. However at this age the child strongly needs to leave the family nest, in order to perform independent activities in urban environment. Independence is a key aspect that characterizes teenagers’ development, especially when the young individual acquires motile competencies.Research shows that in early adolescence young individuals exhibit needs for independence in terms of movements in order to construct their own activity space. This is observed trough increasing of both outings and interpersonal contacts outside the family environment. The trip from home to school is a journey that is one of the determinants of personal action space development.However, it can be in strong dependence to parents and automobile if educational facilities are located outside the home neighborhood. In metropolitan areas, many young teenagers find themselves in situation where schools, friends and points of interest are located on unreachable territories without the parent’s car.We explore these questions with an action-research conducted in Luxembourg as part of Interreg IVb ICMA (Improving Connectivity and Mobility Access). Little information is available on these young urban actors. Indeed surveys relating to children are delicate to process, particularly because of strict regulations related to child rights and multiple needed authorizations (parents, schools, committee). In this context, 46 pre-adolescent children aged from 11 to 13 years old have been followed for two days using GPS technology. This geographical data has been coupled with assisted questionnaire on daily mobility, modes of transportation, mobility preferences as well as independence in movements in the city.Combining these two techniques of investigation allowed improving quality of sensible data by controlling, according to space and time, information collected directly from children as well as their trips (number, duration) and their activities (location, time). A principal component analysis conducted on geographical datasets coupled to a hierarchical cluster analysis allowed to construct a children typology based on mobility patterns, visited places and mobility strategies. Results show that if the automobile and the role of parents explain much of the observed mobility patterns, spaces and times where autonomy was possible allow greater appropriation of the territory for these pre-teenagers. Well-serviced urban environments allowed for greater independence, but also for more extensive action spaces. Meanwhile, living in suburbs naturally induces greater (parents’) car dependency. Given to the suburban children’s mobility uses as well as their preferences and competencies still in development, major questions about the future of the mobility of these young “automobilist” must be putted forward.