A new motorway Bypassing Avranches with three lanes is planned as well as a further extension to Nantes by upgrading the RN 137 dual carriageway between Rennes and Nantes.
A new motorway skirting Avranches with three lanes is planned for the long term. The A84 is planned to be extended to Nantes by upgrading the RN137 dual carriageway between Rennes and Nantes.