Let me explain:
- The service road is exposed to at least one extremely dangerous avalanche path. A gully actually runs over the service road, collecting snow from above. The section itself is relatively narrow (about 20 m), but if an avalanche triggers, you're gone.
- The slope where winter movement is usually recommended - across Veliki plaz (and where the marked summer trail also runs), is exposed to avalanche from Begunjščica.
Opinion: I prefer moving along the service road because the dangerous part is much shorter. In avalanche-prone conditions, I don't go at all and limit movement to the start of the service road.