yielding of the left general purpose lane to specifically include the HOV lane.

On a highway having more than one lane in the same direction, the operator of
59 a vehicle traveling in a left general purpose lane or HOV lane:
60 (a) shall, upon being overtaken by another vehicle in the same lane, yield to the
61 [over-taking] overtaking vehicle by moving safely to a lane to the right[,]; and
62 (b) may not impede the movement or free flow of traffic in a left general purpose lane or
63 HOV lane except:
64 [(a)] (i) when overtaking and passing another vehicle proceeding in the same direction in
65 accordance with Subsection (1)(a);