Well...the next bridge crossing is around 60 km NE (the dam bridge). Problem here is that even if they had vehicles to get the Russian troops up there....there probably isn’t enough fuel.
Over the past week, Russians have not said how many troops had left the area (best guess that 30,000 to 40,000 were there six weeks ago).
The map I saw yesterday indicated the presence of 6 or 8 identified Russian battalions still north of the river.
The dam and barges are the remaining way out.