Also a Boston boy who loved living in Seattle for a few years in the 90s..: one thing is that folks there could not be bothered with using winter tires, never saw anyone swap them out unless they were hardcore mountain buffs or skiers. Everyone else makes do on all seasons. Combined with little to no snow removal or salting, and Seattle after a winter storm was one of the craziest places to drive ever. I drove a RWD pickup when I lived there, and was sort of a "head to the mountains every weekend" type, so I put snow tires on just to survive. But you knew better than to drive on icy days there if you didn't have to, because it was a skating rink on those hills.

Still miss Seattle, go back every year (or I did before the pandemic) to see old friends and get in some time on Rainier or Baker. Also have to say Seattle food has it all over any East Coast city in my opinion! But in many ways it feels fairly similar to New England culturally. I felt right at home and considered retiring there before settling on Western Mass. Homeboys gonna homeboy.

Seattle has about 10,000 miles of streets and roads.

If they had 50 trucks, each truck is responsible for 200 miles, and could cover major roads in say a 6 to 8 hour cycle.