I thought Leningrad could be supplied by Russians if they occupy hex 189 77.
Road of Life —This is a supply only road that is over water.
The Road of Life was the supply bridge to Leningrad during the German siege. Supplies were sent by boat and truck through Lake Ladoga or truck when it was frozen.
But as you can see, that is not the case here :

Is it an issue, or did I misunderstood something ?