I did some calculations on distances/travel times for the Russian supply change now that the railway system has been disables down in Crimea.
We are now looking at similar distances as for the great Kyiv offensive, around 12 hours to reach destination, offload and get back.
https://twitter.com/DefMon3/status/1560225371089522689
Then there will be organization of convoys, crews that need rest and mechanical failures of various types. Not to mention the frequent ambushes by partisans and Ukrainian special forces.