Riders selected by Waymo will be able use its app to hail a Jaguar I-Pace vehicle equipped with the company’s latest autonomous technology

Alphabet-owned Waymo is asking San Francisco residents to help test its self-driving cars in the city it hopes will be its second market.

The company said in a blog post Tuesday it is launching a research-focused program called “Trusted Tester.” Residents can sign up in the company’s Waymo One app. Those accepted will be able to hail an all-electric Jaguar I-PACE vehicle and later provide feedback on their rider experience.

Riders selected by Waymo will be able use its app to hail a Jaguar I-Pace vehicle equipped with the company’s latest autonomous technology. Drivers seated behind the wheel will assume control if the computer falters or fails to adapt to any number of unpredictable scenarios as it navigates narrow, congested streets alongside pedestrians and cyclists.

The company said it uses the testers to help improve the service. From using the Waymo One app, to pickup and drop-offs, to the ride itself, we receive valuable feedback from our riders that allows us to refine our product offering as we advance our service, the company said in the blog post.

For now the vehicles will have human backup drivers on board. But at some point the company plans to run the vehicles without them like it now does in the Phoenix area.

According to The Verge, riders will need to sign non-disclosure agreements to participate and there will be human drivers behind the wheel as backup.

The announcement comes as some employees have reportedly grown frustrated with the company’s slow pace of expansion. Several members of Waymo staff departed in the last several months, including its former CEO.