23/02/2026
BIM-Driven Corridor Modeling: Classification Principles from Sweden, Denmark and Finland
💡SIA "Madaberi", recently analyzed the civil engineering coding principles used in Sweden, Denmark and Finland to evaluate which system would best support our future development.
Each country has built a highly structured and mature approach but with different philosophies and strengths.
Explore the insights we’ve gathered on coding systems.
Check out our website blog:
📎https://madaberi.lv/bim-driven-corridor-modeling-classification-principles-from-sweden-denmark-and-finland
Here are the key conclusions from our research and experience:
📍Swedish Strengths in Coding Systems:
+ Clearly defined cross-sectional elements with assigned functional meaning and precise vertical and horizontal positioning.
+ BIM models enable filtering and structuring of elements by functional role (e.g., carriageway, sidewalk, shoulder) using standardized alphanumeric codes;
+ Consistent code structure and uniform character length ensure machine readability, automated data processing, and support for digital workflows and machine learning applications.
📍Danish Strengths in Coding Systems:
+ Points, surfaces, and shapes are clearly defined, and standardized letter abbreviations are used within the coding system.
Danish Limitations in Coding Systems:
- The number of characters in element name codes varies, which increases complexity and may reduce readability;
- Cross-sectional elements are not explicitly defined according to their functional significance.
📍Finnish strengths in Coding Systems:
+ Clearly defined points and surfaces (Point codes and Surface codes);
+ Coding principles based on numeric structure;
+ Equal number of digits within code groups, enabling efficient machine readability and automated data processing.
Finnish limitations in Coding Systems:
- Lack of dedicated shape coding;
- Limited definition of vertical and horizontal positioning.
- The coding structure does not specify the spatial location of points or lines.
💡Our analysis shows that modern coding systems are no longer just naming conventions — they shape how infrastructure is modeled, automated, and managed.
✨The key is building a structured, machine-readable, and functionally meaningful framework that supports BIM, automation, and long-term digital workflows.
💬Are you aware of a similar system in other countries? Share in the comments.
Sources:
📎https://coclass.byggtjanst.se/login
📎https://digitalvej.vejdirektoratet.dk/sektion/ms-corridor-roads-and-paths
📎https://wiki.buildingsmart.fi/fi/04_Julkaisut_ja_Standardit/infrabim_nimikkeisto
📎https://drive.buildingsmart.fi/s/GTP9RdyMH9DqibR?dir=/&editing=false&openfile=true
