ABSTRACT: Current web-based multimodal travel planners are able to generate adequate travel advises for public transport journeys using timetable information, but they lack detailed pedestrian routing for the walking parts of a journey. This paper describes an approach to support pedestrian routing in multimodal travel advises. It focuses on a 3D data model to support finding of an optimal route for the individual public transport traveller taking into account his specific preferences and constrains (e.g., wheelchair) for the pedestrian part of the journey. Existing standards and models are explored to investigate approaches to develop such a 3D geo data model. An important characteristic of this 3D model is that no difference is made between indoor and outdoor spaces. The model is a combination of networks and surfaces with corresponding attributes and behaviour. The possible pedestrian connections are modelled by combining so called NodeSurfaces and LinkSurfaces to compute the possible routes. Attributes of LinkSurface such as the direction (including up/down in 3D), the accessibility and pedestrian duration for a specific traveller, support the computation of the optimal routes. A prototype using this new conceptual geo data model was implemented in Oracle 11 g and results were visualized in Google Earth. Oracle Spatial 11 g network shortest route capabilities for logical network are used for finding the optimal route for individual travellers with specific speed and accessibility properties. The developed prototype and performed tests have proven that this approach is very beneficial for enhancing the traditional journey timetables with routing for the walking part of the journey.