Large cities are designed to get people outside, not keep them inside. A delivery raiload would take up space that could otherwise be used to transport people.
replyIt could be an underground system, like sewerage. However, noise might be an issue.
replyObjection: most large cities haven't been designed. They grew, usually starting because they had a significant transportation advantage (seaport, seaport + river, river junction, river + pass).
reply