In this study, we evaluated multimodal network performance under different travel conditions using vehicle macroscopic fundamental diagram (vMFD) and passenger macroscopic fundamental diagram (pMFD). The MFDs of cars and public transport users under different mode, route, and departure time choice scenarios were estimated based on a multiagent transport simulation framework. The vMFD and pMFD have been presented in the literature using, among other measures, different relationships between flow and density. These methods are analyzed to identify the most appropriate representation of a multimodal network’s performance. It was found that, to capture the traffic conditions leading to the maximum flow, both vMFD and pMFD should be presented using vehicle densities. The results showed a reasonable interpretation of network performance under different choice scenarios using the suggested diagrams. It is concluded that mode choice ratio and departure time shifting have markedly large effects, whereas route choice does not.