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Decision support for bridge maintenance

When actions are required to maintain or repair our infrastructure, several decisions need to be made. There are often various options that can be chosen, and the question is how it is possible to know which of them gives the most benefits versus the costs. This issue forms the basis for a decision support model developed in the BIG BRO project.

Aim and goal

The project’s main objective was to develop a new framework for decision support to enable a rational and scientific basis for decisions concerning maintenance actions of existing transport infrastructure.


Maintenance and repair of existing structures, such as bridges, requires that several decisions are made about what to do and when. It is desirable, that the decisions result in using available resources as efficiently as possible, especially since our infrastructure is owned by the society and we want to use our common resources in the best way. Therefore, maintenance decisions need to be taken in consideration of the costs and benefits they give to the society as a whole. However, decisions must often be taken under large uncertainties.


The idea with the project was to contribute to the next generation of conditions assessments and maintenance. The project team has developed a framework for rational decision making regarding condition assessment and maintenance of bridges, where the focus has been on developing strategies for evaluating different decisions using probabilistic methods.


The developed decision support makes it possible to differentiate between different decision options and to see which one is optimal, concerning resource efficiency, and gives the most benefits. It was also important to be able to use the methodology in practice and adapt it to real problems. The project contributes to making our infrastructure more sustainable.


Project name




RISE role in project

Coordiantor and research partner

Project start


2 years

Total budget

3 827 200 SEK


LTH, KTH, Chalmers, NCC, Tyréns


BBT, InfraSweden2030

Project website


External press

Supports the UN sustainability goals

9. Industry, innovation and infrastructure
Rickard Falkman

Contact person

Rickard Falkman


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