# The Standardization Method and Application of the BIM Model for Interchanges
## 6 Example Applications
### Application of Information Depth Levels  
The information depth level of interchange BIM components is mainly used to ensure the integrity, continuity, and appropriateness of BIM component information in different design stages. The design and construction process of interchanges generally includes the design stage, construction stage, operation stage, maintenance stage, etc. The requirements of the BIM component information depth level are shown in Table 7 [32].  
With the depth level of the interchange and the BIM components combined with the main points of the interchange design, the depth level information of the interchange BIM components can be derived. The information of the model can be mainly divided into identification information, dimensional information, location information, and technical information, which meets the requirements in Tables 8 and 9.  
\begin{table}
\begin{tabular}{c c c c} \hline
**Code** & **Class** & **Code** & **Class** \\ \hline
18-08.00.00.00 & Interchange & 18-08.03.00.00 & Auxiliary lane components \\
18-08.01.00.00 & Ramp components & 18-08.03.01.00 & Combined flow connection components \\
18-08.01.01.00 & Directional ramp components & 18-08.03.01.01 & Single entry double exit components \\
18-08.01.02.00 & Semi-directional ramp elements & 18-08.03.02.00 & Increase or decrease in the number of basic lanes \\
18-08.01.03.00 & Loop ramp components & 18-08.03.02.01 & Basic lane increase \\
18-08.02.00.00 & Variable speed lane components & 18-08.04.00.00 & Collector lane components \\
18-08.02.01.00 & Acceleration lane elements & 18-08.05.00.00 & Interweaving zone elements \\
18-08.02.01.01 & Single lane parallel elements & 18-08.06.00.00 & Nose construction elements \\
18-08.02.02.00 & Reduced lane members & 18-08.06.01.00 & Diversion nose members \\
18-08.02.02.01 & Single lane exit & 18-08.06.02.00 & Combined flow nose elements \\ \hline \end{tabular} This table is a preliminary layered coding table for the interchange-specific parts, while the overall space coding table should be coded according to the actual project and the example code table should be coded according to the project-specific components.  
\end{table}
Table 6: Classification and coding of special components for interchanges.  
\begin{table}
\begin{tabular}{c c c c c} \hline
**Stage** & **Model Fineness Level** & \begin{tabular}{c} **Model Geometric** \\ **Fineness Level** \\ \end{tabular} & \begin{tabular}{c} **Model Information** \\ **Depth Level** \\ \end{tabular} \\ \hline Design stage & \begin{tabular}{c} Engineering stage \\ Preliminary design stage \\ Construction design stage \\ \end{tabular} & \begin{tabular}{c} LOD1.0 \\ LOD2.0 \\ LOD3.0 \\ \end{tabular} & \begin{tabular}{c} \(\geq\)G1 \\ \(\geq\)G2 \\ \(\geq\)G2 \\ \(\geq\)N3 \\ \end{tabular} \\ \hline Construction phase & \
\begin{tabular}{c} LOD4.0 \\ \end{tabular} &
\begin{tabular}{c} \(\geq\)G3 \\ \(\geq\)N3 \\ \(\geq\)G3 \\ \(\geq\)N4 \\ \end{tabular} \\ \hline \end{tabular} The geometric fineness level of the model should be increased by one level if dimensions are to be measured.  
\end{table}
Table 7: Modeling level of BIM components at different stages.