In addition to drones, Google also plans to ship with unmanned vehicles.
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According to the US Patent and Trademark Office's earlier publication, Google plans to use unmanned vehicle technology in cargo vehicles to provide a more convenient delivery service, and perhaps further integration with its Google Express services.
According to the relevant narrative content, in addition to the automatic driving of the cargo vehicle to the delivery location by the unmanned vehicle technology, the various container doors for storing the goods on the vehicle are digitally locked, and the corresponding opening password will be completed by the user. Orders, or items sent through the service to the user's mobile phone (or other information carrier). When the cargo vehicle arrives at the designated location, the consignee can use the password to open the container door to pick up the goods. As far as the relevant fees are paid through the Google service online, it seems that the direct payment can be directly applied to the vehicle through credit card or mobile phone sensing. The sensing device completes the payment.
Prior to this, Google actually tested the drone delivery service called "Project Wing" in areas such as Australia, although it only provided small parcel delivery compared to the weight and overall quantity of the vehicle. Compared with vehicles, there are still many places that are not easy to reach. At the same time, there are also cost problems such as single driving time and fuel consumption. The drone delivery basically still has its advantages, so the delivery services such as Amazon have been introduced. Man-machine with delivery service. 
