Many (all?) large cities are experiencing traffic congestion in one form or another. This is typically manifested in the morning and afternoon commutes as the largest numbers of public transport passengers (on rail, tram, bus and ferry) and private car users seek to negotiate transport corridors that are not designed for those volumes within those compressed time frames. It has become known as 'gridlock' and is characteristic of a system pushed well beyond a tipping point. The problem has both technological and social origins with one contributing to and indeed magnifying the other. It is a 'wicked, messy' problem and one that has not responded to (and likely never will) conventional planning practices. This paper investigates the utility of General Morphological Analysis to present the causal factors from a systems-based perspective; expose the underlying and unfavourable conditions that conspire in knowable ways to create this congestion; and offer a more favourable set of conditions based on necessary technological and social adjustments that can eliminate, or at least reduce, the congestion. The method outlined encourages planners to appreciate the complexity of the problem space and design meaningful lines of effort based on a deepened appreciation of numerous interdependencies. The research findings can benefit any large city experiencing congestion and low participation levels in public transport.