Right now it's 50 km long. The urban part is served by light rail and the whole length by suburban train. But overall that design failed to provide any noticeable benefits.
1. https://www.openstreetmap.org/?mlat=48.71167&mlon=44.51389&z...
Chile is a linear country. The most linear country on earth, in fact. In fact there was a map on reddit, (from memory) where each country was replaced in its geographic boundary by its name. It worked great for every country except Chile, where they succumbed to writing vertically "CHILE CHILE CHILE CHILE CHILE" totally exceptional killed the game.
I bet I would love Volgograd. More than the locals.
The other place that is like that is SF, the Peninsula, and South Bay. They always talk about going North or South, like in Chile, never East and West.
Volgograd is quite nice but it loses locals due to its 'rust belt' legacy.