Utah Code § 41-6a-903.1: Right-of-way -- Zipper merge.

(1) As used in this section:

(a) "Merge point" means the point at which two traffic lanes merge into one traffic lane.

(b) "Zipper method" means a method of merging vehicles at a merge point that involves the operators of the merging vehicles:

(i) using both lanes of traffic until the vehicles reach the merge point; and

(ii) once the vehicles reach the merge point, alternating yielding the right-of-way into the single traffic lane.

(2) An operator of a vehicle shall use the zipper method when merging at a congested merge point.

(3) A violation of this section is an infraction.