Category "i-80"

Which road shall I take from Denver, CO to Salt Lake City, UT: I-80 or I-70 w/ US-6?

I'm interested in what route to take between Denver, Colorado and Salt Lake City, Utah, and vice-versa. http://maps.google.com/maps?q=Denver,+CO++to++Salt+Lake

Driving in the winter (Dec-Jan) from Ohio to California

Before Thanksgiving I am planning to drive from California to Ohio using Route 70 through Denver, for the sights. But I am returning back to California in Janu