MapLibre resolves symbol collisions from the topmost layer down, so the layer underneath is the one that gives way.
belowMapLabels — the signs give way to everything, the base map's own labels included, so a
sign never lands on a street or place name. Sparse maps, and the price of a tidy one: in a city
the labels take most of the room. Affordable because a sign repeats along its stretch, so one
dropped where a label sits reappears further along.belowRouteIcons — the signs give way to the route's own icons, each of which says something
the road cannot, but take precedence over the base map's labels.aboveRouteIcons — the signs give way to nothing, for a map whose subject is the limits.
What a section's signs give way to when two symbols want the same spot.