Two circle lines outperform a single one

Here is an follow up to a prior post mentioning the new outer circle line in Moscow which is currently under construction.

The figure below depicts all of the outer metro circle’s 30 new stations (bold) and some major interchanging stations.

This is a quite spectacular, or less fancy, ambitious public infrastructure project, since most parts of it will be located below Moscow’s surface.

The outer circle is expected to provide access to an additional million of community members.