*SR-201, not SR-210 (which is the road up little cottonwood). The continuation of the freeway section of SR-201 is functionally I-80, not this surface street. 

Really, I find that a highway designation is a pretty meaningless indicator of what functional class the road should be. There's a correlation for sure (highways are more likely to be primary), but the cause and effect is reversed. Just because a road is maintained by the state doesn't make it inherently more or less important than a road maintained by the city or county; the current classification guidelines are designed to take into account the road's characteristics and importance more than the designation.