This article sets out and briefly explores three main contentions. One is that mobility is a crucial aspect of social stratification – such that “transport disadvantage” is intimately tied up with social exclusion more generally. A second is that insofar as there is a green case for basic income (BI), there seems also, for similar reasons, to be a green case for free public transport. The third is that even while such a step might be deemed necessary for social and environmental justice, it is (unsurprisingly) by no means sufficient to achieve either.