The Not So Easy Solution to Reduce Traffic

This is a TLDR version of CGPGrey's video "The Simple Solution to Traffic" but I have my own solution to reduce traffic which is at the bottom of the post. I was inspired by his video to make this post.

Traffic. It wastes our time and more importantly, our money. Luckily enough, there are a few solutions to reduce traffic.
The first one is block driving. This is technique is used by police in some countries and is law in others where drivers line up with cars in the other lanes and drive at a constant speed. This is used in times of heavy traffic and allows for a better flow of traffic.
The second is keeping a buffer window. A buffer window is a space between the person in front and behind you. The space created is the same length for both drivers giving you and the person behind you the most time to stop.
The third solution is having everyone drive self-driving cars that communicate with each other within a fraction of a second. This allows other cars to communicate and coordinate when they can go. This eliminates the human factor which brings me on to my last point.
The last solution is no more humans. No humans = no traffic.

Now it's time for my solution. Suspended lanes. The way it would work is that the lanes are supported off the ground by some sort of support like overhead bridges.

With suspended lanes, while the cost would be insanely high, traffic would be minimum since there's no interference except other human drivers. The human factor can't be eliminated unfortunately but this eliminates other factors like animals crossing the road. Let's say a deer comes and crosses the road. The first who sees the deer brakes a bit. The second person brakes a little harder. Then the third, the fourth, the fifth, etc. This removes external factors like animals. While we can't fix the whole problem, we can fix some of it. If we can combine this with self-driving cars, this might work, as long we have the money to build it. This doesn't have to be everywhere. Only in areas of high traffic would it be necessary but that is up to you to decide. Intersections can be made into overpasses with enough space.

My solution has many flaws but I want to hear your solutions to reduce traffic. I don't care how ridiculous or unrealistic they are. Just make something up in your own post.