International audienceNumerous studies have focused on the sustainability of commuting in different localisations in urban areas, particularly in terms of GHG emissions. They mainly take into account journeys within cities and rarely consider individuals leaving them to work in another urban or rural area. The particularity of this article is to focus on medium-sized cities (French urban areas with populations between 100,000 and 500,000 inhabitants) which have been less studied by researches on commuting and on the commute of workers leaving their urban area of residence. The aim of this study is to provide detailed results of their mobilities in terms of social categories, distance travelled, modal choice, locations of workers and jobs (c...