Pilot-tested in Scottsdale, Ariz., the program will now be available in Houston.

Kroger said it will soon end a pilot program in which more than 2,000 grocery deliveries were made in self-driving vehicles from one the Kroger-owned Fry’s stores in Scottsdale, Ariz.

The program launched last August and featured deliveries in autonomous vehicles from a robotics company, Nuro.

USA Today reports that two Kroger stores in Houston will now have access to the delivery program.

Like in Scottsdale, the program will start by using Nuro’s self-driving Toyota Prius fleet, then introduce a new generation of driverless vehicles later this year, according to USA Today.

“During this pilot, it was learned that we can deliver a service that our customers love — providing convenience and fresh groceries for our customers safely in the communities,” Pam Giannonatti, a spokeswoman for Kroger, told USA Today. “This engagement shows the immense appetite for affordable, safe and convenient delivery options.”

Scottsdale customers who participated in the pilot program will switch to a different grocery-delivery service provided by Kroger in partnership with a company called instacart. This service does not use self-driving vehicles.

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