Before revision:  Relaxing door-to-door vehicle requirements to allow short walks , is shown to be crucial for ODRP to become a viable alternative for both human-driven and automated vehicles , if the ODRP must serve all requests .
After revision:  Relaxing door-to-door vehicle requirements to allow short walks , is shown to be crucial for ODRP to become a viable alternative for both human-driven vehicles and walks allowed has a total cost at a similar level to that of a door-to-door ODRP system with driverless vehicles .