Cars don't work because a bunch of well-meaning but clearly either incredibly stupid or incredibly lazy politicians have butchered the road system with utterly idiotic ideas like letting pedestrians start crossing before the cars go
The humans in the cars are not more important than the humans in the cars. If the humans go after the cars then you just have people in cars waiting for people not in cars at a different phase of the use of the intersection, it doesn't actually improve anything.
Sure it does. You haven't fully thought this through. Traffic flow is all about minimizing latency. Say you have a two-cycle light:
- 30 seconds in direction A
- 30 seconds in direction B
A pedestrian crosses the road in cycle A, preventing the traffic in that direction from turning, which prevents the cars behind from going straight. Those cars wait for 30 seconds in direction A, then 30 seconds in direction B. Latency is 60 seconds.
Worse, nothing prevents this from happening two cycles in a row. Latency can then grow to 120 seconds, 180 seconds, etc. I've sometimes had to wait at the same intersection in SF for as many as three cycles in a row because of pedestrians preventing cars from turning right. When you have to spend five or six minutes at two or three intersections in a row, you could literally walk much faster. The worst case vehicle latency is arbitrarily bad with this design.
Contrast with:
- 30 seconds in direction A (no pedestrians)
- 30 seconds in direction B (no pedestrians)
- 15 seconds in all directions (pedestrians only)
Maximum latency for cars is 45 seconds.
This approach is also roughly break-even for pedestrians, with the worst case being probably 45 seconds of latency for the first (assuming buttons are required) and 60 seconds for the second. But for the second, you get to cross both ways at once, which can save time and energy.
You can also put two 15-second walk cycles in, and your latency for walking gets cut roughly in half, and your latency for driving remains the same in cases where only one cycle gets blocked by pedestrians. And in cases where multiple cycles in a row get blocked by pedestrians, the latency for driving can be arbitrarily better.
Fixing parking is a heck of a lot cheaper than fixing any of the alternatives.
If you don't care about the noise, pollution, and use of space from the cars then that must seem true.
Just ban gasoline cars within the city center like Paris is doing (by 2030). Noise and pollution are largely a solved problem at that point, assuming you run street sweepers often enough to clean up the tire dust.
As for space, having to dedicate one parcel every block or two to parking is a small price to pay for being able to get around... unless you mean the streets themselves, in which case I would point out that streets provide natural light for the buildings. They aren't wasted space. They're a health necessity.