I don't know your property situations; I live in a townhouse and at the end of my driveway is a patch of grass that we put our trash/recycling out on but multiple dogs (including my next door neighbor's) use it for their bathroom and their owners don't pick it up. When they go on my driveway proper, I use a shovel, etc. and fling it over to my neighbor's driveway; I'm retired so home when he's at work and/or he really doesn't care; he has the corner lot and does not clean up after his dogs in his yard, lets them roam off leash (and doesn't pay much attention, screams at them when he finally notices they're over in my yard/bushes). I like my neighbor though, he's helpful in some things and I don't care to make a problem over sh it

Parts of everybody's property, especially that nearest the road/water (we're on the water) actually has gas/electric/cable, etc. right-of-ways, isn't "ours" to mess with.

I don't know that with the heavy kinds of snows you have that there is any way to keep from having too "high" a level of snow in order to get the street/driveways cleared. It's always inconvenient for awhile; I remember how angry I was last year because someone pulled their car back in a parking space at the parking area in order to shovel the snow around their car and when the snow plow came, they couldn't get through because that car wasn't pulled forward enough, was sticking out in the street and, since it's a private, residential area, not a priority street, the plow just went away defeated and my third of the street didn't get plowed that day!

If this snow goes away some before the next batch, I'd see if I couldn't fashion a fence or posts of some sort so you could get to the area from your driveway area but the across the street person couldn't and/or see if you can get plowed first so there's no "room" for his snow?