Planning routes using transportation network maps is a common task that has received little attention in the literature. Here we present a novel eye-tracking paradigm to investigate psychological processes and mechanisms involved in such route planning. In the experiment, participants were first presented with an origin and destination pair before we presented them with fictitious public transportation maps. Their task was to find the connecting route that required the minimum number of transfers. Based on participants' gaze behaviour, each trial was split into two phases: (1) the search for origin and destination phase, i.e., the initial phase of the trial until participants gazed at both origin and destination at least once, and (2)