Utah Code § 76-9-102.1: Aggravated disorderly conduct on a street or highway.

(1) Terms defined in Section 76-1-101.5 apply to this section.

(2) An actor commits aggravated disorderly conduct on a street or highway if the actor:

(a) intentionally, knowingly, or recklessly obstructs vehicular or pedestrian traffic on a street or highway with:

(i) a speed limit of 40 miles per hour or more; or

(ii) at least two lanes in the same direction of travel; and

(b) refuses to comply with the lawful order of a law enforcement officer to move from the street or highway.

(3)

(a) Except as provided in Subsection (3)(b), a violation of Subsection (2) is a class B misdemeanor.

(b) A violation of Subsection (2) is a class A misdemeanor if within one year before the day on which the actor violates this section, the actor was previously convicted of a violation of Subsection (2).