Bicycle Law Rights to Freeway Shoulder?

Bicycles are allowed to ride the shoulder of the freeway when there is no reasonable alternative. During the six months of winter, I am unable to commute on the Recreation Path that is closed due to snow and avalanche danger. Therefore, I must ride the shoulder of I-70 freeway in order to commute 16 miles a day to work. I live at Copper Mountain Village and must commute through Officers Gulch between the Gore Range and Ten Mile Range of mountains in Colorado to reach the Town of Frisco. Recently, a CDOT snowplow driver attempted to detain me on the shoulder of the freeway to instruct me that I should not use the freeway. I am looking for the legal citations concerning bicycle legal rights to the freeway shoulder.Bicycle Law Rights to Freeway Shoulder?
Many freeways have signs clearly indicating whether bicycles are allowed on any particular section. In most places, there are regular streets that are a reasonable alternative, and are signs at the freeway entrances indicating that bicycles are prohibited. In a few areas where the freeway is the only route for a short distance, there are signs at the end of the section where bicycles are allowed saying where the bicycles must exit. An example of this can be seen on California Route 23 between Thousand Oaks and Moorpark.



In any case, if a snowplow was in use, then there was snow on the freeway. Regardless of what the law may or may not say, it is no safe to ride a bicycle on a freeway with snow, because cars (illegally) go normal freeway speeds (without slowing adequately for the snow) until they skid off the road and onto the shoulder, striking any bicycles that happen to be there.
IN my State, there are signs on the Interstate entrances that say " motor vehicles only" " no motorcycles under 150 cc" ( i think ) Who, in their right mind would even think of riding a bicycle on the freeway ??Bicycle Law Rights to Freeway Shoulder?
Check with your DMV or your Highway Patrol and see if that driver had the right to Detain You.