Waiting by the side of the highway

This dog has been by the side of the major highway near my home every day since early last fall. He's usually lying down right next to the road's edge, sleeping, waiting... Yesterday I took some food to him, but when I approached he skitted off and watched at me warily. I'm sure he's one of Belgrade's many abandoned dogs that must have been tossed out at this place, and is waiting....for his owner's return. Very, very sad.