Highway drivers sometimes struggle to use full lanes to merge when a lane is closing or ending. This is known as the “zipper merge.” Thankfully,McDonald’s has helped show Americans they can do it?

McDonald’s has several advantages in encouraging a smooth zipper merge process:

1. A shorter runway to merging. You often go around a turn, order, and immediately merge. In contrast, highway merges can sometimes be seen from a mile or more away and some want to block all that space.
2. A physical separation of the lanes before merging. The vehicles are ordering before merging and the need to have a display board and speaker means the lanes cannot be crossed into. Even if a driver wanted to block the other lane, the physical barriers make that difficult.
3. People want to get their food. While driving on the highway, the goal is to get somewhere quickly. Different motivations.
4. Might it matter that McDonald’s is private property while highways/roadways are more of open or public space?

Some of these principles could be applied to highways. Imagine temporary physical barriers between the lanes to force a merge closer to the end of the lanes. Or, reminders that blocking lanes has (legal?) consequences even though it is more public space.