Fig. 3From: Synchromodality in the Physical Internet – dual sourcing and real-time switching between transport modesWhen \(S_{r} \leq I_{p}^{t} < S_{i}\) (case 1), only intermodal transport is used to ship \(Q_{i}^{t}=S_{i}-I_{p}^{t}\) units (and \(Q_{r}^{t}=0\)); when \(I_{p}^{t} < S_{r}\) (case 2), an order of \(Q_{r}^{t}=S_{r}-I_{p}^{t}\) units is shipped using road transport, and \(Q_{i}^{t}=S_{i}-S_{r}\) units are shipped via intermodal rail transportBack to article page