At this stage you have several options:
Continue on another impressionist walk on 'Jatte Island' or finish the tour,
In any case, after having crossed Marshal Joffre's quay at the traffic light after the Levallois bridge,go up the stairs (or the elevator) on the bridge .If you want to finish the walk, you can:
either turn left towards Asnières towards the train station of Bécon-les-Bruyères (Transilien Line L), or
take the Levallois bridge on the right and go to the Pont de Levallois-Bécon metro station (Line 3),
Otherwise join the start of the walk "the impressionists and the Island of the Jatte" by the staircase located in the middle of the bridge.