A few years ago, San Francisco served as a testing ground for delivery robots from various companies. That stopped after the city restricted their use on its sidewalks, requiring firms that want to unleash their machines in the city to secure permission to do so. The fact that San Francisco is now officially allowing a company to test delivery robots could be a big step towards their deployment.

It's not entirely clear if Postmates did anything special to convince local authorities, but it recently hired Apple veteran Ken Kocienda as a principal software engineer for the team developing Serve. Further, as TechCrunch notes, the company replaced the robot's LIDAR technology with something more lightweight and durable.

A Postmates spokesperson told TechCrunch in a statement:

"We've been eager to work directly with cities to seek a collaborative and inclusive approach to robotic deployment that respects our public rights of way, includes community input, and allows cities to develop thoughtful regulatory regimes.

Based on San Francisco's Public Works Code, permits that allow the operation of autonomous delivery devices on sidewalks remain valid for 180 days. They also grant the authorization to test up to three delivery robots per permittee, though the machines can't operate in high-traffic areas and they have to be monitored by a human operator within 30 feet.