At Schaarbeek the route splits in two; northward bound trains continue over line 25N, line 25, Antwerp and HSL 4 to the Dutch border, eastward bound trains continue over line 36N, line 2 and line 36 to Liège and from there over line 37 and HSL 3 and again line 37 to the German border.
At Schaarbeek, the railway tracks split into two routes: one for north-bound trains that continue on lines 25N and 25 to reach the Dutch border, while another route is for east-bound trains that travel over lines 36N, 2, and 36 to reach Liège before continuing onto line 37 and HSL 3 to reach the German border.