Hey,
Thanks for the quick feedback. I saw that it was changed back to -1, which is better from the roadnetwork viewpoint. But now I understand the concept with the previous solution.
Thanks for changing it back!

Hello @DoKimbDeSun

I'd just like to ask that what was the reason for putting osm.org/way/387380584 to layer=-2 instead of -1?

I just wonder, because in our OSM-based solution, it caused a bit of a visual glitch. And based on images (no Mapillary unfortunately), we saw no such huge change (https://guidetofaroeislands.fo/wp-content/uploads/2021/06/eysturoyartunnilin-worldrsquo-s-first-under-sea-roundabout-1-700x394.jpg), which calls for this difference, in contrast to all the other layer=-1 of the tunnel system.