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This paper presents an experimental protocol allowing to measure car accessibility motions and to evaluate associated discomfort feelings. The aim of these different approaches is firstly to acquire knowledge about motor strategies and secondly to be able to animate a numerical ergonomic mannequin. A video optoelectronic system has been used to acquire 3D movements data realized with 4 half french car units. A 3D digitizer has also been employed to measure static postures allowing to size and animate our numerical mannequin. Five voluntary subjects have participated to pre-experiments. Collected data have undergone several examination processes in order to prepare the mannequin animation. In other terms, kinematic analysis of body segments will allow to understand and to characterize ingress and egress movements from vehicles.