Making ETCS L3 happen is not only dependent on the availability of suitable solutions to the task of onboard train integrity monitoring. Economical and political aspects have to be considered as well. The provision of practical, reliable and vital train integrity monitoring systems seems to be very difficult on trains that have no electrical infrastructure. As a consequence, for the time being, the introduction of ETCS L3 might be limited to dedicated passenger lines or corridors operated with state of the art freight trains that are equipped with a train bus system allowing for train integrity monitoring.