It is difficult for people with limited mobility to find an optimal route. Everywhere, barriers such as stairs, high bus boarding or lack of wheelchair access can make the way difficult. The WikiNavi project is therefore developing an ICT-based assistance system that uses data from different sources for optimal route guidance. The ICT-supported assistance system takes into account all limitations of mobility, including the individual degree of physical or age-related disability, but also the heterogeneity of mobility chains in urban everyday life. In this way, users will be able to influence the underlying data basis of hurdles that have already been recorded in a controlled manner in order to report newly discovered barriers.