The last mile in parcel delivery can take 35-50% of the total transportation costs because of the difficulty of transporting individual shipments to many different urban destinations. To meet growing consumer demand in e-commerce, parcel carriers undertake more delivery trips, congesting the roads & clogging the streets. While delivery vans were only 7% of urban travel in EU in 2015, they already accounted for 18% of the congestion.Efficient parcel delivery requires vans to deliver most packages to very few addresses. This is only possible with a dense network of urban mini-hubs that would serve many citizens at the same time. Logistics carriers have started deploying their own networks of click-and-collect parcel lockers but they are based on the outdated inefficient technology of a mailbox of a fixed size with an electric lock, which puts a limit on their scalability.Tardis is a compact, modular single-access window parcel locker that automatically defragments itself. Tardis rearranges parcels inside to free space for additional ones, which results in 300% more parcels stored than in a traditional parcel locker of the similar floor size. Tardis also contains several temperature zones enabling grocery & other perishable goods delivery.Tardis storage efficiency will allow us to build & deploy smaller & more efficient parcel locker networks in dense city areas capable of handling all typical online purchases of an urban dweller. With our parcel lockers, we will be able to reduce the costs of the carriers 3-4x, offering them a competitive advantage, create an open scalable urban delivery network & lay the foundation for same day delivery—the next frontier in online retail & B2C logistics.We forecast revenues of €41m by 2023 (for a multi-city network of ~539 units), aiming for €350m+ by 2027.In this project we will finalize the value proposition, create maps of locations for 1st installations, carry out cost/benefit analysis & secure partnership agreements.