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.

Zipper merging is still a tough sell for many in Washington who believe drivers moving into traffic correctly are simply cutting the line. Maybe Washington state needs to take a page from Montana to ...

COLORADO, USA — Zipper merging needs better signage so badly that the Federal Highway Administration commissioned a study to determine if specific signage would get more drivers to zipper merge and ...

You recently wondered why drivers find it relatively easy to merge from two lanes to one entering the District on I-295 north (Kenilworth Avenue), using the alternate merge approach, as opposed to the ...