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Highway spending increased by 90% in 2021. This is one of many reasons why car traffic is growing faster than population growth.
You can use cars more efficiently but by and large they aren't.
Also, you think people are gonna share a car? Fat chance. People would need to work out shared upkeep, time slots to have it, etc.
We simply need to stop subsidizing cars which is the whole point here.
Doesn't Lyft work sorta like that? Idk, it doesn't operate in my country, but from what I've seen online, it's several strangers sharing one ride.
But after giving it more thought, I tend to agree with you on this. Except... After posting my comment I got curious and decided to calculate the efficiency of cars vs busses. I always assumed that they were way more efficient than cars (cause lugging around 2 tons of steel just to move 1 or a couple 70kg hairlines apes is stupid). But it turns out that busses only win if we compare it to cars with only one passengers. So basically, at half load, both are about equally efficient (about 10%). And on average a bus is only half full. Turns out, busses are really heavy... there's of course the density, and busses win if you give each passenger their own car, ~~but if we pack cars fully, they will be significantly more efficient~~. Not to mention if you use smaller European cars that carry basically their own weight in passengers.
So my conclusion is, to maximize efficiency in the future we should try to implement a system of highly packed smaller sized transportation devices.
Edit: I did some more calculations and now disagree with my own conclusion. Busses still win even when cars are reasonable utilized, not to mention the usual utilization, which is 1.2 passengers.
More details in this comment.
There are multiple levels of efficiency or benefits here for the bus over the car
I already crossed out the statement you're referring to and added and edit, but I was talking strictly about weight carrying efficiency. As in, how much useful work is done compared to carried weight. You still make some fair points that I didn't consider though.