The AutoCAD platform offers a significant advantage due to its extensive range of professional software for secondary development. In the field of road design, examples include EICAD and Hongye Municipal. Civil3D, developed on the AutoCAD platform, is specifically designed for 3D infrastructure projects such as highways, railways, and water conservancy. It introduces surface and route objects and employs parametric design, aligning with the BIM design concept. However, AutoCAD itself is fundamentally a 2D auxiliary design tool, and in practical applications, Civil3D’s 3D capabilities—such as data support, hardware requirements, and processing efficiency—are not optimal. Autodesk recognizes these limitations in Civil3D’s 3D representation and model integration, and is actively promoting InfraWorks software to visualize detailed Civil3D designs, enabling analysis, evaluation, and collaboration to enhance the reliability of detailed designs and predict project completion outcomes. Autodesk’s BIM core modeling software, Revit, is not based on AutoCAD and uses axis positioning, making it more suitable for vertical, individual construction projects. In contrast, road design relies on centerline positioning, which falls under linear engineering.
Meanwhile, due to the slow adoption of BIM in the transportation sector, many specialized software solutions for roads and bridges remain rooted in 2D design and have yet to transition to 3D BIM technology. Road and bridge design software based on Civil3D and Revit’s secondary development is still lacking. Creating and maintaining general family libraries for components like bridges and culverts falls on individual engineers, which is an overwhelming task that significantly slows the promotion and adoption of BIM design in transportation engineering. A major issue with the Autodesk platform is the need to strengthen its product portfolio. The use of different data formats across various software results in information loss during data exchange, hindering information sharing throughout the project lifecycle.
MicroStation is designed and continuously optimized as a unified platform, with nearly all Bentley applications running on it. These applications cater to diverse fields and cover the entire infrastructure lifecycle. Its broad range of functions includes drawing, rendering, and even advanced animation production capabilities. This unified platform ensures informatization and seamless sharing of BIM 3D models. Bentley’s solutions are widely adopted in the transportation industry abroad; for instance, 47 out of 50 U.S. state transportation departments use MicroStation, and 45 of them utilize Bentley’s transportation design software. However, Bentley entered the Chinese market relatively late and has faced challenges with market development and localization, resulting in limited recognition during the era of 2D design in China’s domestic transportation sector. With the rise of the BIM era, localization efforts have intensified, and a series of professional software products—such as Power Civil for China, Bridge Master Modeler (Chinese version of Open Bridge Modeler), and BridgeMaster—now effectively meet the BIM design needs of the transportation industry.
The core of BIM design lies in the visualization of 3D information models, emphasizing informatization and the sharing of 3D design data and models. To maximize the benefits of BIM throughout the design, construction, operation, and maintenance lifecycle, seamless information flow from the model downward is critical. Based on this analysis, this article intends to use PowerCivil as the BIM modeling tool for road design.
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