Washington, DC (CNN Business) FedEx is the latest company to join the delivery robot craze.

The company said Wednesday it will test a six-wheeled, autonomous robot called the SameDay Bot in Memphis, Tenn. this summer and plans to expand to more cities.

including Walmart, Target, Pizza Hut and AutoZone, to understand how It's partnering with major brands,including Walmart, Target, Pizza Hut and AutoZone, to understand how delivery robots could help other businesses.

FedEx's interest highlights how businesses are increasingly focused on automating deliveries . It also raises concerns about the impact on cities and employment, as robots crowd sidewalks and delivery jobs are automated.

Robot deliveries on sidewalks have been contentious in dense cities such as San Francisco. Pedestrian advocates are concerned about motorized vehicles, such as robots or e-scooters, crowding sidewalks and potentially creating safety issues.

FedEx's six-wheeled, autonomous robot called the SameDay Bot will hit streets this summer.

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