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Consumers increasingly expect that goods they purchase online will be delivered rapidly, even as soon as the day of purchase. Although efficiencies in long-distance transport of parcels have greatly improved delivery times, last-mile logistics (the final step in delivery to consumers) present a bottleneck for delivery companies. Time pressure resulting from consumer expectations is not the only challenge; other obstacles, such as the increasing congestion of roadways, persist. While innovations to mitigate these challenges have been emerging—the use of cargo bikes, for instance—success has been constrained due to the additional complications that arise (e.g., the low parcel carrying capacity of the bikes). Consequently, ________