Kato UNITRACK makes it simple with modular easement and superelevated curves, available with modern pre-cast concrete ties (which not only modernize the look of your rails, but help differentiate the pieces at a glance from non-banked track pieces). Please note that all of these Concrete Tie Double Track pieces are 100% compatible with the regular double and single track Unitrack pieces and bridges and can be added into your existing Unitrack layouts!