Truncating graphical route summaries of transit routes for display via graphical user interfaces

The present disclosure relates to systems, non-transitory computer readable media, and methods for determining a transit route to a destination and generating a shortened graphical summary of the transit route to present on a computing device. For instance, in some cases, a system determines a transit route by which transit vehicles transport a user along route segments to a destination. The system further generates or configures a graphical route summary that includes segment graphics representing route segments from the transit route. To shorten the graphical route summary to fit within a graphical user interface, the system can successively perform one or both of (i) segment-level-truncation operations on individual segment graphics and (ii) summary-level-truncation operations on the graphical route summary. The system can further present a truncated graphical route summary in the graphical user interface based on one or both the segment-level-truncation operations and the summary-level-truncation operations.