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.

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 ...

LANSING, Mich. (WLNS) – It’s construction season in Michigan, which means orange barrels, backups, and bad moods. To help with traffic jams, Michigan law enforcement is reminding drivers to use the ...

PORTLAND, Ore. — From city streets to state highways, the gripe about merging on the roads is heard often. Oregon and Washington's departments of transportation want drivers to zipper merge to keep ...

Zipper merging reduces backups by up to 50% during lane closures statewide. The method uses both lanes fully and merges vehicles alternately at lane ends. WSDOT urges drivers to plan, maintain speed ...