BIM-based flowchart for improving road construction planning and management

[EN] Road construction planning and management still face limitations due to insufficient BIM interoperability and the difficulty of assigning time and cost data to design-stage solids in linear infrastructure projects. This paper investigates how a BIM-based workflow can improve the integration of construction-oriented information in single-carriageway road projects. A new workflow, supported by custom plugins, is developed in Autodesk Civil 3D using Dynamo, enabling automated virtual segmentation of road solids, the definition of new PropertySets for station, time, and cost, and their export through IFC4 and IFC4.3. The workflow is applied to a real construction project, demonstrating improved interoperability, reduced modeling time, fewer errors in time and cost assignment, and enabling a more granular level of detail at the construction stage. These results are particularly relevant for road designers, BIM managers, contractors, and project managers seeking to automate 5D BIM workflows for road infrastructure. The proposed approach provides a foundation for future research on extending automated time and cost integration to more complex road typologies, additional construction elements, and other BIM platforms.