This presentation illustrates how roadmaps and scenarios are used, and can be used, in the diverse field of nanotechnologies. Its aim is to draw lessons from nanotechnologies to: 1. Ascertain how the social sciences and humanities (SSH) can contribute to developing research agendas, 2. Clarify which terms, approaches, and methods (e.g. Delphi) are mobilized in roadmap and scenario planning, 3. Provide concrete suggestions on how to develop scenario-driven roadmaps in equally complex and uncertain fields, such as radiation protection.