The old RN177 was declassified into RD577 in Calvados, RD977 in Manche and RD177 in Ille-et-Vilaine. The RN177 has since 2006 been declassified into the RD677.
In a strange move by the Calvados DDE, drivers wishing to reach Deauville and the Côte Fleurie are advise not to use the trunk road but to use the single carriageway RD27A that follows a similar course along the Lisieux-Deauville railway line. Weekend tourists are often caught in traffic jams on the A132 while wanting to join the RN177 as well as at Bonneville-sur-Touquesroundabout where several départementales converge. It is also at that location that the gendarmerie sets up speed cameras and alcohol control.