Autonomous delivery robots will be able to travel on sidewalks, crosswalks and shared-use paths throughout the Commonwealth of Virginia this summer. Gov. Terry McAullife recently signed a law permitting the use of Starship Technologies' Personal Delivery Devices, or PDDs. The six-wheeled robots, which resemble coolers, are designed to deliver parcels, groceries and food within a two-mile radius in 15-30 minutes. The PDDs weigh about 40 pounds and can carry a workload of up to 20 pounds. They travel at 4 mph.