Its a dirty world.. they spread gravel on the Icy well used roads after a freeze. [salt not used here]

Portland gets colder than the Coast in the winter..
big cold airmass behind the Cascades comes down the Gorge.


studded tires do chip away at the road surface. I5 has double track grooves.

one spot in the bridge west of here the concrete road bed
is chipped down to the steel reinforcing wire grid.