[selectodude]

> When snow falls in western WA, the fall at the start gets melted by the ground, and the refreezes as the following fall hits it. This results in an ice layer covered in snow.

Which is why cities that competently deal with snow begin salting immediately when it starts snowing.

[bobthepanda]

Does salt work on hilly terrain?

In my experience in Seattle what I've seen a lot is the snowmelt washes salt downhill, so you generally just get back to square one.