General Motors' Cruise Automation is partnering with DoorDash on a food delivery service using self-driving cars. The service will operate in San Francisco, and only in the areas of the city where Cruise's prototype self-driving cars already roam. The pilot program will begin in March, according to a DoorDash blog post. Runners will load deliveries into cars, and customers will be notified when a car is approaching their address in order to pick up their food.