With construction underway on Michigan roads, it's a certainty you'll need to merge down to one lane at some point: State officials are urging drivers to "zipper" merge, a method to navigate congested ...

Traffic merges at East Holly and North Forest streets for construction in Bellingham in 2009. Most states encourage drivers to utilize the “zipper merge” and wait until reaching the cones to merge.

GRAND RAPIDS, Mich. — If you've been stuck in traffic during construction, you may have noticed cars speeding by in the lane about to end. It may feel unfair, but that move — using both lanes until ...

That’s the message from Colorado State Patrol when it comes to approaching lane closures in construction zones or in heavy traffic. “The ‘zipper merge,’ isn’t just courteous, it helps in keeping ...

There are permanent zipper merge opportunities on state highways and city streets. “If you had some kind of signage that was very explicit, so that you said something like, ‘zipper merge, use both ...

The zipper merge can be an effective method to manage traffic in congested construction zones. The Michigan Department of Transportation rolls out road signs to notify drivers where it is in place.