After years of development, CAD technology has become a cornerstone in the 2D design market. Nearly all secondary development highway design software is built on this platform, establishing a standardized and unified foundation at the core technology level. The design outputs are saved in AutoCAD’s proprietary data format, ensuring compatibility across different software developed by various companies. This interoperability eliminates barriers to data reading and modification, significantly enhancing collaboration efficiency. Moreover, the drawing content adheres strictly to the standards set by the Method for Compilation of Design Documents for Highway Engineering Basic Construction Projects (Jiaogongdao Fa No. AI-B_SC_0_358), issued by China’s Ministry of Transport. These standards cover detailed display elements such as frame size, font specifications, and graphic methods.
BIM technology, as an emerging field, faces urgent challenges in data standardization. While some countries have established dedicated BIM departments to develop standards that facilitate BIM adoption—primarily within construction engineering—these efforts have yet to extend to the transportation sector. Industry standards for BIM in municipal and highway engineering remain underdeveloped and fragmented, particularly in highway projects where no unified standards or interfaces currently exist.
Highway engineering is characterized by its linear nature, with long routes and complex combinations of roadbed, pavement, and slope structures. The environment surrounding these roads often changes significantly, involving numerous specialized disciplines and diverse software requirements. As such, establishing comprehensive industry standards represents a systematic and complex undertaking.
Currently, the leading BIM core modeling software originates mostly from international companies eager to capture the growing market. Key players include Autodesk’s Revit and Civil3D, as well as Bentley’s MicroStation and PowerCivil series. Data exchange within these manufacturers’ software ecosystems is generally smooth; however, each vendor maintains its own proprietary data formats and information standards. Because each BIM platform offers unique strengths, projects often require multiple BIM software tools, such as Autodesk’s Revit Civil3D for modeling and Ansys for performance simulation, developed by separate companies.
This lack of a unified BIM data standard complicates direct data sharing and integration among different tools, often leading to data loss during conversion. Consequently, consolidating project information into a cohesive BIM model proves difficult when design and construction teams use disparate software. For example, inconsistencies between BIM tools used by designers and builders can reduce efficiency in guiding construction and prevent decision-makers from managing the entire project lifecycle through a unified information platform.
The variety of BIM software available offers specialized options for construction professionals, but competition among developers to enforce proprietary data standards limits cross-platform collaboration and hampers widespread BIM adoption. This fragmentation is a significant barrier to the large-scale implementation of BIM technology.
Relying on the Method for Compilation of Design Documents for Basic Construction Projects of Highway Engineering (Jiaogongdao Fa No. AI-BT-SC0_358) to guide BIM applications is increasingly inadequate. This approach effectively perpetuates traditional workflows—starting with 3D renderings, then producing 2D drawings, and finally returning to 3D models for revisions and simulations—rather than leveraging BIM’s full potential. Currently, despite the use of parameterized 3D models during design, legally binding submissions in the transportation industry still consist of 2D drawings.
Developing national standards tailored specifically to BIM’s unique characteristics would be a major step forward in advancing standardization within the domestic BIM industry and promoting more effective use of BIM technology in transportation projects.
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