ETCS Level 3 – today the highest level of ETCS – relies on train-side detection of trainintegrity. This paper elaborates on newly designed alternatives for detection of train-integrity. The fundamental safety targets of German train protection systems served as a basis for the presented alternatives. We compare these alternatives to the effects on capacity at lines and different kinds of stations. Furthermore we show the positive effect to control of shunting traction vehicles and the use as a fall-back level are shown.