This symposium will bring together social scientists and humanist scholars to discuss large-scale infrastructure projects from an ethnographic perspective. On the occasion of the 25th anniversary of the pioneer study of the Yacyretá high dam by Ribeiro (1994) and drawing on the more recent infrastructural turn in anthropology and related disciplines (Anand, Appel & Gupta 2018; Harvey, Jensen & Morita, 2017; Larkin 2013) this symposium puts the spotlight on one particular type of infrastructure, namely megaprojects. Based on ongoing fieldwork with officials and ordinary Moroccans along Africa’s recently inaugurated first high-speed rail, I will discuss the different temporal registers linked to large infrastructure projects, and the ways in which they can elucidate shifting ideas and experiences of citizenship.