Intermodal journey planners provide a comprehensive view and detailed routing information for different modes of transport. In addition these services often allows a combination of different transport modes to multimodal trip chains, with reasonable interchange points like park and ride facilities to change from car to public transport. Vehicle sharing systems, that become more popular in recent years, present another possibility for such trip chains and have the potential to improve the first mile/last mile connection to other transport modes. This paper deals with different integration scenarios of vehicle sharing content into intermodal journey planners and route calculations, based on the development steps at the Traffic Information Austria (VAO). Furthermore an outline of improvement potential for the calculation of sharing routes with respect to vehicle availability prediction is presented.