Implementation of a geological disposal programme for radioactive waste is a major undertaking. Consideration must be given to the long time over which the programme operates, the technical assurance which needs to be demonstrated to ensure long term safety and security, and the socially and politically sensitive nature of radioactive materials management. This publication provides a roadmap for developing and implementing a geological disposal programme for spent nuclear fuel declared as waste, high level, and intermediate level waste. It identifies the important components and sequences of activities that are the responsibility of the implementing organization to construct and operate a geological disposal repository in a manner consistent with existing international experience. The publication also provides information on how several advanced programmes have progressed along their respective roadmaps toward siting, constructing, and operation a geological repository.