As we decarbonise societies, we need to consider how such transitions interconnect energy and transport systems. In this Commentary, we argue that we need a better understanding of who may be vulnerable in low-carbon transitions. Current energy poverty definitions and metrics focus overwhelmingly on energy service consumption within the home, yet similar issues in the transport sector are often neglected. Failure to account for the intersections between energy and transport poverty may deepen structural forms of deprivation and worsen social and material inequalities, therefore preventing equitable transitions.