Train racing. No I will not elaborate.

Create a large network of state and/or cooperatively owned cannabis farms to mass-produce hemp for industrial purposes, and every strain of quality marijuana known to man. You think the weed's too strong these days? That's ok, the state will devote its resources to developing 10% THC strains that taste like a gourmet meal. You want to be sent to the moon? Why yes, there will be 99.9% pure concentrate oils widely available.

Just as the USSR had an alcohol ration, there will be a mids ration available for all. Any unclaimed rations will be distributed to the gulags to forcibly pacify political prisoners. While high and marginally more open-minded, they will be made to play video games where every character is a black lesbian and all the messaging is based on post-colonial theory. Only after their daily shift constructing and tending the farms is finished, of course.

Any questions?

Community cafeterias. 1 caf per x (tbd) population.

• informed by national-level dietary guidelines
• very receptive to local neighborhood dietary preferences and encouraged to develop specialties
• worker controlled
• kitchen teams could swap/guest in other neighborhoods to mix things up
• you can go to cafs in other neighborhoods but there would probably be some system to anticipate demand to avoid over/under prepping (like you have a home caf but you can make reservation at another one?)

You can eat there or get take out.

Benefits:

• less food waste
• don't have to waste time shopping, chopping, cooking and cleaning when you don't want to
• will not have insane "chef" centered kitchen cultures, unless everyone working there votes in favour of this for some reason

High speed rail running the 'spine' of the americas - people should be able to go from Alaska to the far end of Chille and not need to transfer (although one imagines a number of stops along the way)

Lithium in the water supply makes a dent in the suicide numbers, but it's been a long time since I was crazy enough to put real thought into it.

We’re bringing back Roman bath houses and including spots to nap in public there in case you have like an hour and a half gap between things you have to do but it’s too far to go home. Really just more public space investment

I would go hard on pushing public nudity as fine. I don't want to be naked in public but human bodies are normal and nothing to he ashamed of.

Americans would fucking hate it but they'll get over it.

Tubes!

• All mail (letters and small items) to be delivered by a pneumatic tube systems. Civilian tubes are free. Business post cost increases considerably so only important things are sent. I don't want fifteen tubes landing a day with junk mail in them. Parcels to be delivered by traditional post people, but better compensated and with less punishing rounds thanks to lower amounts of corporate mail.

• New tunnels beneath water to be made of indestructable glass like an aquarium. Other policies will have reduced pollution and helped rewild the rivers and oceans for more to see. More underwater tube tunnels to be built to reduce reliance on planes and boats.

• Vertical mega-gardens/farms in transparent towers. Tops extend upward to save space and capture sunlight, bottoms extend downward for natural geothermal warming to reduce energy consumption. Different ambient temperatures based on geothermal depth would allow for growing plants and produce native to different climates. No more shipping flowers or fruit across the planet! More tall green towers! See argriculture happen in real time!

This is conpletely serious but definitely a crank answer:

Create a network of Greenways on the scale of our railroads and interstates, carving out huge swaths of cities and connecting every state and national forest and park.

Then maintain the ecological integrity of these Greenways by making practical indigenous land management and foraging mandatory topics in schools.

I will also maintain a small army of engineers to run clean, running water through the greenways (for handwashing) as well as an army of pilots and EMTs to make sure the Greenway dwellers have access to modern medical infrastructure.

Again, I am completely serious.

your proposals are all quite nice but none of them would knowingly ecocide half a continent & cost/generate more power than has ever been used by humanity for the simple goal of refilling the LA River

oh yeah, its NAWAPA TIME

the orbital solar condenser + ground based collection disk from simcity 3000. like normal solar power but spicier