State Transportation Departments Encourage the 'Zipper Merge'


Episode 1104

Motorists often find it rude when other motorists merge at the point of a lane closure, instead of merging ahead of time to wait in the line that has formed. But Washington and Minnesota State Departments of Transportation have now made this "late" or "zipper" merge the law, and are encouraging motorists to do this. The zipper merge actually increases the highway's capacity, which helps traffic to move faster. The key is that motorists in the lane being merged into, allow one car go ahead of them from the other lane.