I-70 sucks, as it's the only main route east-west through Colorado. Also goes to most of the ski areas so it's super crowded with SUV's, motor homes and 18-wheelers (but there are a half-dozen better and twistier routes).
It's 20 degrees and it snowed this weekend so I couldn't take the bike up there. But the Central City road is freshly paved and has to have lots of twisties to climb 2,000 feet in that short distance. Plus it will take a lot of traffic off the Clear Creek Highway, which was the only way up there before the new road. Another reason to ride Colorado next year.