Originally Posted by
UA Fan
I believe even at stations with multiple lines, each line has it's own platform.
Almost right
Each line has its own track, but in a few cases a platform hosts two lines. They are: Kitay-Gorod, Tretjakovskaya, Kashirskaya, Park Pobedy, and Kuntsevskaya.
The Filevskaya (light-blue) line splits into two after Kievskaya station, however it is still considered a single line while in most countries it would've been called something like F1 and F2 lines