Signposting along the Seine à Vélo was already in place in the Val d'Oise, Eure, Calvados and Seine Maritime at time of writing. Along the way, you’ll spot cycling signage in white and green carrying the Seine à Vélo logo, plus N°33, the number for this French cycle route.
Here are the sections where the route is being marked out (South-North direction):
Paris centre, intra-muros: no signposting in place at time of writing, so remember to download the route.
In the Hauts-de-Seine: signposting was being finalized at time of writing.