Earlier quoted context omitted.
Russia has already struck the Zatoka bridge south/west of Odessa, the best/shortest route from Odessa to Danube river and Black Sea ports in Romania. Most of the trains in Ukraine is electric-pulled. Russia has already struck most of the railway power transforming stations. Ukraine has very limited number of diesel trains. It can't use European ones because of different wheelbase. (correction thanks to the commenter…
> Most of the trains in Ukraine is electric-pulled. Russia has already struck most of the railway power transforming stations. Ukraine has very limited number of diesel trains. It can't use European ones because of different wheelbase. Ok top of that, there is a gauge change when crossing over from Ukraine to the west and the infrastructure towards the west is hardly at the level required. For example, train crossing…
Yet another example where Russia didn't think carefully enough before invading.