They have mostly wasted their railway infrastructure following the collapse of USSR. RVR[1] car maker wound down, some tracks has closed down due to lack of us

They have mostly wasted their railway infrastructure following the collapse of USSR. RVR[1] car maker wound down, some tracks has closed down due to lack of use or excessive wear. They have some commuter trains and some coordinated cross-border train pairs. Russia to Kaliningrad also runs through Lithuania as mandated by international agreements. I don't think you can embark at Vilnus though. There were Moscow-SPb-Tallin and Moscow-Riga sleeper trains for a long time, but COVID and lack of funding led to their demise, and now the war, too. There was also Moscow-SPb-Helsinki "Lev Tolstoy" sleeper train of the same fate. 1. https://en.m.wikipedia.org/wiki/Rīgas_Vagonbūves_Rūpnīca https://en.m.wikipedia.org/wiki/Rīgas_Vagonbūves_Rūpnīca