Набрел в интернетах в
гайде по поездке из Бухареста в Кишинёв:
...this border crossing can take quite a bit of time (on my return it took around three hours). This is because they need to change the wheels on the train (yes, you read that right - they need to change the wheels).
It was Stalin’s great idea that certain countries should have different thickness railroad tracks (they are slightly thicker in Moldova so the trains from Bucharest quite literally stop on these tracks).
Stalin’s reasoning was this - he wanted to prevent smuggling of drugs, guns, money you name it, into his borders. Also, he wanted to stall the Germans should they ever invade Russia, hence the difference in track size. These days it is just a major inconvenience.
Не, понятно, что в советское время там ЖД перешивались и строились с колеёй 1524. Но то, что лично Сталин виноват в том, что в 19 веке в России выбрали такую ширину колеи, я слышу впервые. :)