The Kroger Co., one of America's largest grocery retailer, and Nuro, a robotics company, are launching their autonomous grocery delivery service in Houston.

The service will be available through two Houston Kroger stores, reaching customers residing in four local zip codes.

Since August 2018, Kroger and Nuro have operated a popular, first-of-its-kind self-driving grocery delivery service in Scottsdale, Ariz., servicing a single zip code with an autonomous vehicle fleet. In late 2018, the partnership expanded to include Nuro's custom vehicle, R1, marking the nation's first fully unmanned delivery service available to the general public.

The pilot proved the companies' combined technology and digital expertise can transform the grocery delivery experience. Together through the pilot, Kroger and Nuro have successfully and safely completed thousands of deliveries to customers in Scottsdale. With the upcoming launch, Kroger and Nuro will transfer the autonomous grocery delivery program to Houston for the next phase of the pilot.

Like Scottsdale, Kroger and Nuro will begin the service with Nuro's self-driving Toyota Prius fleet and will introduce the next generation of the custom driverless vehicle later this year.

Scottsdale customers will continue to have access to delivery through Kroger's established service available through frysfood.com.