[2_listerine_pls]

> Congestion is solved by properly designing cities and their transit systems

Redesigning a city/system won't eliminate congestion because it can form even in straight-line conditions:

https://www.youtube.com/watch?v=6ZC9h8jgSj4

It all starts when a single car slows down, causing the car behind slow further, the chain reaction continues until all traffic stops. The phenomena can be seen as waves in the video. However, breaking is not the cause of the problem because this situation wouldn't exist if individual cars were able to accelerate at the same time as those in front. The answer are smart vehicles capable of accelerating with zero reaction time.

I don't think congestion is a problem by itself as long as there are no traffic waves and no bottlenecks ahead. Just imagine congested traffic moving uniformly at high speed.