https://en.wikipedia.org/wiki/Georges-Eug%C3%A8ne_Haussmann rebuilt Paris. That was partly for artistic reasons, but the wide boulevards had the nice benefit of being riot-safe.

Looking at a map of Kairo, this may be a similar approach, just that they build it next to the city (since they expect massive expansion in any case) instead of remodelling existing parts: whatever they will build will be more structured, and thus easier to lock down than the maze of the current city.