The Lübeck-Fehmarn and HamburgFlensburg routes in SchleswigHolstein and Hamburg are to be equipped with ETCS by 2028 and 2030, respectively. In order to maintain the existing performance of the routes and to be able to implement long-term timetable concepts, a comprehensive analysis of the effects of ETCS on rail traffic is necessary. The investigation is intended to represent the infrastructure requirements for ETCS that can be derived from the long-term offer concept, so that the offer concept can be implemented with the introduction of ETCS. Stable operation must be demonstrated. If no solutions are available due to the technical development, appropriate solution proposals are derived in the investigation.