The Crown Prince of Saudi Arabia, Mohammed bin Salman, has announced a project to create a "city of the future" that will look like a thin strip of development along the line of a modern railroad. It will not have the usual streets and quarters, and neither will highways - all movements will be made by train or on foot, no longer than 5 minutes walk. The city will stretch for 170 km and will be home to 1 million people.
The main idea is that if there are no streets and roads, then the problem of car operation in the city immediately disappears. No cars - no emissions into the atmosphere, no traffic jams, no accidents, no complicated infrastructure for traffic regulation is needed. And also there is no risk of dying under the wheels, plus people do not need to spend money on personal transport, the parking problem disappears, and instead of a garage in the house, you can arrange a veranda or a playground. High-speed trains run every minute, and the journey through the entire city will take no more than 20 minutes.
The entire infrastructure is tied to the central line, communication schemes are extremely simple, only clean energy is used everywhere, and artificial intelligence controls the city. However, this means that all buildings and complexes should be the same in terms of operation, differences can only be in appearance. You cannot build a huge mansion for yourself with many amenities if your neighbors live in typical panel high-rise buildings. And this automatically filters the population of the city - the rich will not want to settle here, and the poor will not be able to afford comfortable apartments.
Experts note that although the difference between 1 and 5 minutes of walking is symbolic, it is still there. Therefore, a prestigious "first line" of development is formed along the railway and the rest behind it, which already slightly distorts the concept. Further, how to deliver heavy loads to homes, if there are no access roads, how will the ambulance and firefighters arrive, how to move the disabled? The complete elimination of streets and traffic on them is a very ambitious task for architects and city planners, and it will take a lot of work on it.