A widespread consensus exists internationally and in Denmark about the relevance of pursuing goals for sustainable transport development but only limited research about how national transportation planning can become a pillar in this process.

The goal of SUSTAIN is to expand this research and consolidate a framework on three core domains for a National Sustainable Transport Planning (NSTP): 

1. sustainability,
2. institutions and
3. tools.

Research within these three domains will address the following questions:

• How can the concept of sustainability be operationalised and transformed into strategic performance measures for national transport planning?
• How can these types of knowledge about organisational forms and planning processes contribute to the achievement of such sustainability measures?
• And how can these new types of knowledge be built into new model-based planning tools that can help advance the strategic planning in the desired sustainable direction?