A zipper merge is when lanes ahead are closed. Drivers use both lanes of traffic until the merge point, where they would take turns merging into the open like, like a zipper.

It’s been over three months since construction started on I-490 over the Erie Canal, but the frustration is far from over.

Michigan transportation officials and state police are urging drivers to embrace the zipper merge technique as summer ...

Waiting to merge until the last possible moment can be seen as cutting in line, but it’s actually the best method for ...

There's a name for it: late merging, though advocates prefer the term "zipper merging" because it doesn't have a negative connotation. According to Ken Johnson, a Minnesota State Work Zone ...

Engineers say zipper merging may help traffic flow 03:32. We’ve all been there: you merge far in advance, just like you learned in driver’s ed, only to watch as the driver who was behind you ...

Sioux Falls drivers are gradually, if not grudgingly, coming around to the idea of zipper merging in construction zones. It’s ...

Instead, states that ask motorists to use the zipper method want all available roadway used up to the merge point. The zipper is not intended to be used when traffic is flowing briskly, with ample ...

And we're going to need it. Right now, ongoing work on Interstate 40 in the Pigeon River Gorge causes a merge situation. We've got other projects coming up where it's going to come into play.

The zipper merge is a tried and true technique that's been used in Germany and other European countries for decades. In recent years Minnesota's Department of Transportation has been promoting it.