Yep, here is an infographic showing the breakdown of those incarcerated on drug offenses. Most are in local jails, then state prisons, then federal prisons.

Federal prisons may have the highest proportion, but they have the lowest amount of people total in them for drug uses.

One in 5 people who are incarcerated are incarcerated on drug offenses. While it may not be the 45% percent of federal prisons, it’s still hundreds of thousands of people, and you could still make the argument that drug users are flooding prisons, (as one of the above comments claimed was not the case) depending on what you think flooding means.

This is the most comprehensive thing ever with even more really good graphics.

Another thing is less space taken up by parking. I forget the city, I want to say its Nashville maybe? That something insane, like close to 50%, of all the space in the city is parking.

I guess it would cut down on the total traffic, because the total amount of cars in the circulation of traffic would be lower. Because if multiple people/parties can use the same car throughout the day, it would mean that they don’t individually have to drive.

I think the better option is generally busses/trams/trains, because they do the same thing with more people, and the last mile can be done walking, cycling, etc. with some taxis and cars for elderly or carrying loads or whatever.