DURHAM (WTVD) -- NCDOT and North Carolina State researchers are studying the effectiveness of the "zipper merge." The rather unique sign was installed 2 weeks ago where NC 147 meets southbound I-85.

RALEIGH, N.C. (WTVD) -- Rapid growth in the area, such as the recent announcement of Apple opening a headquarters here, is leading to what we're calling a Triangle Transformation. In the coming months ...

Have you seen the road sign “Right lane closed ahead, merge left,” but while you move to the left lane, other cars fly by you in the right lane? Then they duck into the left lane ahead of the cars in ...

DENVER — AAA estimates that more than 60 million people will travel by car this week. That means 60 million people have the opportunity to zipper merge. In the state of Maine, the signs are more ...

Summer is prime time for construction in Washington state. With hundreds of construction projects scheduled across the state this summer, routes are altered on many cross-state trips. These projects ...

I'm unaware of such a law. To my knowledge the sign is informational (especially if it's black-on-yellow) and is there to let you know that lanes will be ending.