Hey!
I do transit maps and diagrams for fun!
Here is my approach to show the soon to be metro network of Sofia, Bulgaria.
Lines M1 and M2 are in operation.
I have already included the M3 line which is supposed to be operational this year.
Posted this already on Reddit and other channels but I'd like to know what you think of what your feedback is too :-)
Have a great day/night!
Chris