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The "general danger" of I-70 is non-existent. It's a highway used by thousands of people, every day, all winter long. It's the road that connects Denver with Vail and dozens of other ski resorts that drive Colorado's winter economy. When there is bad weather, it gets top priority and is cleared as quickly as possible.

Chains wouldn't be a bad insurance policy at all. On a Civic, you'd want cable chains, and you should practice putting them on before you get out on the road. If you have snow tires, you also wouldn't have to use chains, and if road conditions are really bad, they will simply close the highway.