A vehicle with at least three stable bearing points on the ground, of which at least one at the front and at least one at the rear of the vehicle, comprises an arm fixed to the front of the vehicle, at a free first end of which arm are mounted a steering unit, and a seat situated at the rear of the vehicle. The arm is movable relative to the seat between a first remote and lockable position, relating to a self-support mode, wherein a first distance is provided between the steering unit and the seat in order to receive a person in seated or semi-seated position on the seat, and a second closer and lockable position, relating to a walking assistance mode, wherein a second distance smaller than the first is provided between the steering unit and the seat. The steering unit forming a support means in this second position.
