 The A26 autoroute passes by the commune.The village of Rely existed during the Gallo-Roman period and was located on a Roman road, the ‘’Chausée (carriageway) Brunehaut’’, that connected Thérouanne, Arras and Boulogne-sur-Mer.Many villages on or near this Brunehaut road have the same origins, such as Blessy, Estrée-Blanche, Ligny, Auchy-au-Bois and Ferfay.