In addition to random celebrity sightings, residents of West Hollywood, CA will soon be spotting autonomous delivery robots in their neighborhood. Last night the West Hollywood city council approved the use of delivery robots on its city streets (hat tip to WeHoVille). A trial of the program will start next month with Postmates' Serve robot and run for 90 days. Serve is a cooler-sized robot that scurries around on four wheels, and while it can run autonomously using sensors and cameras to avoid people and obstacles, the city council is requiring a human chaperone during the trial. Additionally, only three robots can be in operation at once, they can only run during the day, and they aren't allowed on sidewalks deemed substandard.