Common crossing

Frog. Fixed Part of the turnout, also known as crossing, suitable to route the gear on both branches of exit. In order to minimize lateral stresses and thus ensure greater ride comfort, better preservation of the rolling stock and the diverge itself, “curved” are adopted, rather than “straight“, connected with the curvature of the needle and intermediate rail, relative to the diverging route. It Is called The frame of the frog, or crossing device, consists of the whole of the guiding rails and the frog itself