A California-based autonomous vehicle robotics company that has deployed self-driving delivery cars in Houston already has announced another pilot program.

Nuro and Walmart announced a new collaboration for high-tech, affordable grocery delivery — first to a select group of shoppers, and then, later in 2020, to a wider range of customers.

"Walmart is committed to serving our customers whenever and however they choose to shop," says Tom Ward, Walmart's senior vice president of digital operations, in a news release. "We are excited to work with Nuro and continue to learn as we are incorporating self-driving technology in our delivery options, learning more about our customers' needs, and evolving Walmart's future delivery offerings."

Nuro's fleet of custom R2 delivery vehicles as well as its autonomous Toyota Priuses powered by Nuro's software have already been deployed in Houston through a couple of partnerships launched earlier this year. This summer, Nuro premiered its pizza-delivery option through a collaboration with Dominos after first entering the Houston market in March with its Kroger grocery delivery.

The new Walmart partnership adds variety and affordability to Nuro's suite of partnerships.

"Walmart's dedication to its customers aligns with our desire to help people save time and money while making shopping easier. We are excited to join forces with Walmart to help provide the best possible delivery experience to customers," says Cosimo Leipold, Nuro's head of partner relations, in the release. "Working alongside Walmart gives us an incredible opportunity to improve our door-to-door operations, serve Walmart's loyal customers, and continue to integrate and engage with the Houston community."

The new opportunity comes for Walmart as the company is expanding its access. The company has expanded to offer pickup options at 3,100 locations and deliveries from more than 1,600 stores — all supported by a team of over 50,000 personal shoppers, Ward writes in a blog post.

"We're already bringing the best of Walmart to our customers through Grocery Pickup and Delivery," Ward writes. "By continuing to test autonomous vehicle capabilities, we're better able to understand the path self-driving technology can take us down the road."