Metronamica can be extended with a transport model that simulates road congestion and regional accessibility. It works on the level of transport zones, which are typically smaller than the administrative regions used for the regional model. The transport model includes a wide range of policy-relevant drivers, such as introducing new roads, toll costs, parking costs and public transport policies.

The Metronamica transport model is based on a classical four-step approach. In the production-attraction step, trip origins and destinations are computed based on the activities in each transport zone. In the distribution step, these origins and destinations are linked to produce an origin-destination matrix. Subsequently, trips are partitioned into different modes of transport mdash;e.g. cars and public transportmdash; in the modal split step. Finally, these trips are placed on the network in the assignment step.

Based on this assignment transport indicators such as travel time, congestion and accessibility are derived, which are relevant for impact assessment and also feed back into the land use and regional model.