Route main road 15bis

The trunk road 15bis , or RN 15bis , was a trunk road French connecting Grandvilliers to the Tréport while following the valley of the Bresle. Following the reform of 1972, it was displaced in RD 1015 except between theGallic one and Aumale where it was renumbered in Trunk road 29 and between Aumale and Senarpont where it was displaced in RD 316 (between theGallic one & Senarpont, RD 1015 corresponds to the ex MINOR ROAD 44 of the Somme which avoided the crossing of Aumale and a turning of 3 km). At the beginning, the Département of Oise had renumbered its section RD 915bis but it was then alligné on the department of the Somme.
RN 15bis was radial, it did not have any relationship with RN 15 (just like the Trunk road 24bis did not have any relationship with the Trunk road 24) but was a junction of the Trunk road 1.

Old layout of Grandvilliers to Tréport

Old layout of Grandvilliers with Sénarpont (D 1015, NR 29 & D 316)

Old layout of Sénarpont to Tréport (D 1015)

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