There's interesting non-pneumatic work from the Swiss company Cargo Sous Terrain, with self-poweres robot carriers shuttling materials around a city. Haven't heard or seen much in specifics, but their design material looks flashy & cool, and they supposedly are doing a tunnel. https://spectrum.ieee.org/cargo-sous-terrain
Outside of Atlanta GA, there's Pipedream, which launched a modest-sized intra-city auto omous robot delivery system at the end of 2023, which is cool. https://interestingengineering.com/transportation/worlds-fir...
It probably isn't worth the trouble nor a real efficiency gain but the idea of evacuated tubes with low air resistance or maybe even using real pneumatic pressure sounds cool. Especially for longer distances, higher capacities, the idea of some kind of hyperloop like system but a bit smaller & not human rated would be neat, could eliminate a colossal amount of CO2 & effort.