Utah Code Title 41. Motor Vehicles § 41-6a-701. Duty to operate vehicle on right side of roadway--Exceptions

(a) when overtaking and passing another vehicle proceeding in the same direction under the rules governing that movement;

(b) when an obstruction requires operating the vehicle to the left of the center of the roadway subject to the provisions of Subsection (2);

(c) when overtaking and passing a bicycle or moped proceeding in the same direction at a speed less than the reasonable speed of traffic that is present requires operating the vehicle to the left of the center of the roadway subject to the provisions of Subsection (2);

(d) on a roadway divided into three marked lanes for traffic under the applicable rules;  or

(e) on a roadway designed and signposted for one-way traffic.

(2)(a) A person operating a vehicle as described under Subsection (1) shall yield the right-of-way to a vehicle:

(b) When overtaking and passing a bicycle or moped under Subsection (1)(c), a person operating a vehicle shall not pass a bicycle or moped proceeding in the same direction if the pass cannot be made safely, including under any of the following conditions:

(a) overtaking and passing another vehicle proceeding in the same direction;

(b) preparing to turn left;  or

(c) taking a different highway or an exit on the left.