Walt, when is the last time you've had to drive into DC, or take the Metro? If it's been 20 years or more, trust me, it's only gotten worse. I can remember, back in the late 90's, I used to go into DC a lot. I had a '79 Newport, which was not a small car, even by 1979 standards, yet I rarely had trouble finding a place to park. But, it's a lot worse now. A lot of street parking these days is limited to residents of that particular area, and they'll make you put a permit sticker on your car. Roads that used to be only gridlocked for a couple hours now seem like they're gridlocked almost 24/7. I don't know that adding more roads and parking structures would be the answer. Route 50, going in from Maryland, would easily need to be doubled in width, and then would still be congested.
There's the old joke about why do we drive on a parkway, but park on a driveway. Well, the Baltimore-Washington "Parkway" throws that joke to the wind. And again, not just during rush hour anymore.
Commuting is bad, whether you're in a car or taking the Metro, but I think they still need each other, sort of an unholy matrimony!
Oh, and don't get me started on bike lanes though. They've put a bunch of them all over DC, to the benefit of a relative handful of people, and all the bikers do is bitch whenever one gets blocked. Yet they don't have a problem running red lights, riding on the sidewalks, hitting pedestrian, and so on. They've taken out parking spaces, and even travel lanes in some occasions.
I haven't been into DC in a few years now, but I think the last time I drove there, I had to park about a mile away from my destination. That was probably in 2018. The last time I went to DC, by any means, was 2019 to see a friend, but that time I took the Metro in. And once I got there, it was still about a half-mile walk.
Oh, and let's not forget that damn Benning Road streetcar of theirs. I think it's been in work for years now, and has gone millions of $ over budget. It messes with parking, snarls traffic, and does nothing that a bus couldn't do. There was also some streetcar that they tried to build down in the Southeast part, on the Maryland side of the Anacostia River. But it's just a bunch of tracks in the pavement that go nowhere, as it was abandoned before it was finished. Politics at its best, I guess.