Make it a circle, get rid of the mirror, fill in the center. Bam! You got yourself a city.
A circle is harder to build and has more issues regarding sunlight. The sun hitting the building(s) is both a benefit (solar cells) and a problem (heat generation) at the same time. A linear structure will get a much more even energy distribution than a circle. Also one of the goals of the project is to reduce the energy needs of the population by making ways shorter. If you spread a city out on a circle, you got a m…
In a traditional street network, there are many ways to get from A to B and one link being unavailable is not the end of the world. Forcing everyone onto essentially the same street is guaranteed to cause both high fragility and high congestion, since everyone has to squeeze into the same line.