Utah Code § 41-6a-708: Signs and markings on roadway -- No-passing zones -- Exceptions.

(1)

(a) A highway authority may designate no-passing zones on any portion of a highway under its jurisdiction if the highway authority determines passing is especially hazardous.

(b) A highway authority shall designate a no-passing zone under Subsection (1)(a) by placing appropriate traffic-control devices on the highway.

(2) A person operating a vehicle may not drive on the left side of:

(a) the roadway within the no-passing zone; or

(b) any pavement striping designed to mark the no-passing zone.

(3) Subsection (2) does not apply:

(a) under the conditions described under Subsections 41-6a-701(1)(b) and (c); or

(b) to a person operating a vehicle turning left onto or from an alley, private road, or driveway.

(4) A violation of Subsection (2) is an infraction.