Glad to see lane design mentioned, it's a key component. In most zipper merge opportunities there is a predominant lane and another lane that is ending, leading

Glad to see lane design mentioned, it's a key component. In most zipper merge opportunities there is a predominant lane and another lane that is ending, leading to the idea of a 'right' and a 'wrong' lane which precludes intuitive zipper merging. If lane design (even just the markings) were such that both lanes were equal prior to the merge, zipping together would seem the most natural thing to do whether signposted or not.