How do you merge?

Driving can cause a lot of stress, especially when we're all stuck in traffic. Sometimes a little politeness can go a long way, except, it turns out, when it comes to zipper merging. We enlisted the help of an old friend and expert with the Washington State Patrol to get us all on the same merging page.
Published: 4:53 PM PDT April 9, 2019
Updated: 10:41 AM PDT April 10, 2019