It is also very easy to visit Roubaix when you use the Metro system coming from Lille or from the Belgium Border.
Near Moeskroen / Mouscron (Belgium), there is a Metro station CH. Dron. This metro brings you in no time in Roubaix, from Roubaix it continues its journey to Lille (Rijsel).
Of course also can get here coming from Lille centre, then take the Metro in the direction of CH. Dron.
A single ticket only costs 1.20 euro.
Roubaix is easily assessable:
Coming from Paris, Douai, Arras:
A1 direction Lille, Follow A22 (direction Roubaix), then N227 (direction Roubaix Centre).
Coming from Dunkerque:
A25 direction Lille, Exit 7 (direction Roubaix Centre) via N352.
Coming from Valenciennes:
A23 direction Lille, Exit N227 (direction Roubaix centre) and then A22 Exit 11.
Coming from Brussels or Charleroi:
E429/A8, then E42/A27 direction Lille, Exit N227 (direction Roubaix centre) and then A22 Exit 11.
Coming from Gent/Gand:
E17/A22 direction Lille, Exit 13a (direction Roubaix), Follow N352 (direction Roubaix centre)