Extended Data Fig. 3: Intra-annual comparison between batch and on-the-fly models. | Nature

Extended Data Fig. 3: Intra-annual comparison between batch and on-the-fly models.

From: Addressing the minimum fleet problem in on-demand urban mobility

Extended Data Fig. 3

Plots showing the percentage of trips served within the next 6 min from the time the trip requests are received. In the batch model, advance knowledge of the trip information is restricted to only the next minute (batch time). The trips in each batch are assigned to the available vehicles using the online version of the network approach from the minimum fleet of size 7,440. This approach scores a consistently higher percentage (90%) than does the on-the-fly model. In the on-the-fly model, trips are assigned to the closest available vehicle. To achieve the same level of service using the on-the-fly model, the fleet size must increase by more than 30% (see Fig. 4b). The shaded region represents the 6σ variations when the vehicle warm-up phase is reinitialized 50 times, where σ = max(%)−min(%) is the difference between the percentage of served trips achieved for the runs that score maximum and minimum values for each day.

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