zipper merge

== English == === Etymology === From the resemblance to the closing of a zip fastener, where alternating teeth are brought into line. === Noun === zipper merge (plural zipper merges) A convention for merging traffic into a reduced number of lanes, where drivers use both lanes to advance to the lane reduction point and merge at that location, alternating turns. ==== See also ==== zipper lane === Verb === zipper merge (third-person singular simple present zipper merges, present participle zipper merging, simple past and past participle zipper merged) To carry out this form of traffic merging.