I did a quick Google translation of the most important thing.

A particularly spectacular use was made at the Tiroler A12. A Blackhawk helicopter in low altitude made sure that the trees along the highway are freed from the heavy snow load. "This is currently the safest method in order to reduce the snow load," SFINAG ( the people who are responsible for the upkeep of the roads in Austria,) managing Director Stefan Siegele explains.