A method of performing routing in relation to a multi-modal transportation network involves representing a multi-modal transportation network using a plurality of segments, each being indicative of a navigable segment of the network, and each segment having data representative of a traversal time for the segment associated therewith. The plurality of segments of the multi-modal transportation network includes a first subset of segments indicative of a public transport network, and a second subset of segments indicative of a road network which may be joined, left and traveled through by a user substantially freely at any time. The traversal time data associated with segments of the public transport network associated with interchange points with the road network is based on a transit time indicative of a time taken to travel along the segment, and an additional waiting time. A route search is performed between an origin and a destination within the multi-modal transportation network using the traversal time data associated with the segments of the network in order to obtain one or more multi-modal route through the transportation network.