A few points here from someone hoping to become a professional in related matters.
1) There is an enormous demand to get to manhattan (and a bunch of the rest of NYC, but especially manhattan). There is a limit to the capacity that can feed into and through manhattan without making manhattan so overwhelmed with transportation systems as to do detract from the coolness of manhattan. Even ignoring the people such a system would bring in, if you broaden the roads, you’re going to have to take out sidewalks and/or buildings. And there’s only so many subways that can be built.
2) I’m betting buses don’t get [much] special right of way over cars. If they did, there’d be a never-ending shitstorm over it, and a bunch of people getting the fuck out of their cars, and onto buses (thereby taking up vastly less highway space).
3) The job of public transportation is to provide cheap movement for a person with limited baggage. I doubt it’s failing in that regard. It may not be doing it quickly, or efficiently, but if it were really not doing it’s job, nyc couldn’t exist as it currently does. The tidal volume of people into and out of manhattan is enormous, and presents an ungodly challenge.
4) Congestion will exist so long as road space is unpriced. They will soon be pricing a lane of HOV to allow SOV access to in Minneapolis. It goes up with congestion to maintain freeflowing speeds to a maximum of $8/trip, before it decides that it shouldn’t charge anymore, and kicks all the would-be payers out. It won’t even come close to paying for the upgrade to the system, let alone for the construction costs for the lane. When faced with the actual costs of a highway system, motorists don’t want to pay. (Of course, the only reason there are significant maintenance expenses on roads is because we use them for big heavy shipping things.)
5) Highway congestion will suck as long as public transit sucks. If public transit sucks, nobody’s going to get on it, they’ll get on the highway instead, voila, congestion. Until it gets so fucking congested, that people who might otherwise drive start taking public transit. If you make public transit so that it’s almost as good as an uncongested highway, you’ll have uncongested highways.
Jesus, I wish I could write like this when I had papers due.