Utah Code Ann. § 41-6a-1502 – Motorcycles, motor-driven cycles, or all-terrain type I vehicles -- Operation on public highways.

(1)
1. (a) A motorcycle or a motor-driven cycle is entitled to full use of a lane.
2. (b) A person may not operate a motor vehicle in a manner that deprives a motorcycle or motor-driven cycle of the full use of a lane.
3. (c) This Subsection (1) does not apply to motorcycles or motor-driven cycles operated two abreast in a single lane.
(2) The operator of a motorcycle or motor-driven cycle may not overtake and pass in the same lane occupied by the vehicle being overtaken.
(3) A person may not operate a motorcycle or motor-driven cycle between:
1. (a) lanes of traffic; or
2. (b) adjacent lines or rows of vehicles.
(4) Motorcycles or motor-driven cycles may not be operated more than two abreast in a single lane.
(5) Subsections (2) and (3) do not apply to peace officers acting in the peace officers' official capacities.
(6) The provisions of this section also apply to all-terrain type I vehicles.