# The Standardization Method and Application of the BIM Model for Interchanges
## 1 Introduction  
Once the concept of BIM was introduced in the 1970s, it was rapidly developed, popularized, and applied [1]. The introduction and development of BIM technology in the transportation field came later than in the construction industry, and BIM in China's transportation field is still in its initial stages. The relevant standards and specifications are still being formulated and are not complete; they are especially lacking interchange-related content. As the smallest particle size in the application of BIM technology, BIM components in interchanges are characterized by a large variety and mixed information. Thus, it is necessary to study the standardization of BIM components to promote the application of BIM technology in interchanges and to accelerate the development and improvement of relevant standards and specifications. [PERSON] and [PERSON] [2] proposed that the industrialization of construction should go through several important stages, such as early component prefabrication, component module standardization, large-scale production, and information management. The standardization of BIM components is the key to the development of BIM technology. Foreign research on the standardization of BIM components started earlier, and most of theresearch results are presented in the form of promulgating BIM standards, such as the BIM international standards led by the International Organization for Standardization ISO, and the BIM national standards led by the United States, Singapore, South Korea, Japan, and other countries, which are quite mature [3; 4; 5; 6; 7]. So far, as the IFC standard released by the International Collaboration Consortium in 1997 has provided a standard data model for the field of construction engineering, the BIM standards promulgated in various countries were formulated on this basis to achieve information exchange and sharing [8]. In recent years, some foreign scholars have shifted the direction of BIM research towards practical research. [PERSON] et al. [9] used social network analysis to compare the impact of BIM on the organization of construction projects and elucidated the ways to produce this impact. [PERSON] et al. [10] used physical computing systems to associate physical objects with their digital design information in digital and physical methods. Some other scholars [11; 12; 13; 14] have studied the difficulties of BIM building design coordination. The research work on BIM standardization in China has only been carried out recently, and the research on BIM standardization in highway engineering has just started. Some scholars have studied BIM components. [PERSON] et al. [15] created a standard component library platform according to the current situation of BIM component application management in railway construction enterprises. [PERSON] et al. [16] proposed a clustering method for BIM components and a component library according to the amount of attribute information. As for highway engineering, domestic scholars have mainly focused on the applications of BIM. [PERSON] [17] studied the application of BIM in interchange based on the Autodesk platform. [PERSON] [18] studied the modeling steps and parameter output method of BIM technology in the design process of interchange based on Autodesk's BIM software. [PERSON] et al. [19] discussed the rapid construction method of the terrain model, main structure model, and subsidiary facilities model by using the visual programming plugin Dynamo in combination with BIM. [PERSON] et al. [20] combined BIM and the point cloud model for rapid modeling of tunnels. [PERSON] [21; 22] proposed that the delivery standard system and classification coding system could be applied to highway engineering projects by studying the standard framework at home and abroad in combination with the characteristics of highway engineering projects. [PERSON] [23] extended the coding structure of BIM components to six layers from the perspective of the actual needs of highway maintenance.