Nothing attracts more comments about transportation than discussing the zipper merge. Drivers either love it or hate it. However, traffic engineers agree it is the best and safest way to merge in ...

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 ...

See a "lane closed ahead" sign coming up? Your instinct might be to immediately and politely switch over to the open lane. You might look over in annoyance at the car zooming past in the ...

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 ...

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 ...

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 ...