Montiero said the method allows drivers using a lane that is merging into another continuous lane to alternate the traffic pattern into the main through lane.

The zipper method only works if drivers obey the signs and allow the closing lane to merge when needed. According to WJRT, the method is being tested on two projects in western Michigan.

When a lane is closed in a construction zone, a zipper merge occurs when motorists use both lanes of traffic until reaching the defined merge area, and then alternate in “zipper” fashion into ...

Lawmakers advanced legislation to designate a way to merge on Utah roads, allow pets to be included in protective orders, and give the state oversight of major transit projects.