I've only had to wait one day (once) going over the Siskiyous on I-5 in all the years we go down to Lake Havasu City, AZ and back. Interstate-5 is a major commerce trucking route linking North & South the Western United States with Mexico and Canada, therefore I-5 gets high priority for it's roadwork to keep it free of ice and snow. I've seen it snow and get real icy on the coast route, when the temps really drop and a bad storm goes thru the Cali/Ore border areas. I always stick with the I-5 route, more business if you need services, more lane choices and wider road then the coast route.
