[yooper]

"I agree, on I-5 in the valley and metro area I think that 90% of road damage comes from studded tires on PASSENGER cars, not heavy trucks."

I don't know where you live, but here where I live the only vehicles which can legally use (metal) studded tires are the cops and emergency services....

[Tailback]

Studded tires are legal in Oregon. http://www.odot.state.or.us/comm/newscenter/winter/tires.htm

[EBUCK]

We get to use them (studs) from Oct to April I think.

EBUCK