A lot of cities here now use underground trash collection [1] . At the moment these have to be emptied via truck from above. I could see such an underground system take out the trash directly.
I think the obstacle to connecting trash receptacles to a subterranean logistics network would be just how much tunneling you’d have to do.
CST will connect to urban distribution hubs, with the last mile fulfilled by courier bikes, motorbikes or small delivery vans.