Measured the road in to my neighborhood. It has complex contour (banking plus incline) and varied from 4 to 8 degrees (7-14% incline). There are multiple complex hills that I drive on the way to it, which are notably steeper, but you have momentum working for you of course as it's a road, and not the start of one, nor are they a constant grade over say, miles or thousands of feet even, but maybe 300m or so of hill, although one is about 1/2 mile of hill and probably 10-16% grade itself. Regardless, only my 27% gravel driveway with 6-8" of snow was an issue, and apparently that's a significant obstacle that most people use chains for in the snow?
*I am guessing on all grades other than the road and driveway measured, as I did not stop at each hill obviously.
Random hill on my drive, below:
View attachment 49158