Fix road layers.

Draw roads layer by layer.

map_machine/figure.py

@@ -245,6 +245,10 @@ class Road(Figure):
             except ValueError:
                 pass
 
+        self.layer: float = 0
+        if "layer" in tags:
+            self.layer = float(tags["layer"])
+
     def draw(
         self,
         svg: Drawing,
@@ -259,7 +263,10 @@ class Road(Figure):
             width = self.width
         else:
             width = self.matcher.default_width
-        if extra_width and self.tags.get("bridge") == "yes":
+        cap: str = "round"
+        if extra_width:
+            cap = "butt"
+            if self.tags.get("bridge") == "yes":
                 color = Color("#666666")
         scale: float = flinger.get_scale(self.outers[0][0].coordinates)
         path_commands: str = self.get_path(flinger)
@@ -267,7 +274,7 @@ class Road(Figure):
         style: dict[str, Any] = {
             "fill": "none",
             "stroke": color.hex,
-            "stroke-linecap": "round",
+            "stroke-linecap": cap,
             "stroke-linejoin": "round",
             "stroke-width": scale * width + extra_width,
         }

map_machine/mapper.py

@@ -70,9 +70,14 @@ class Map:
                 self.svg.add(path)
         progress_bar(-1, 0, text="Drawing ways")
 
-        roads: Iterator[Road] = sorted(
+        layered_roads: dict[float, list[Road]] = {}
-            constructor.roads, key=lambda x: x.matcher.priority
+        for road in constructor.roads:
-        )
+            if road.layer not in layered_roads:
+                layered_roads[road.layer] = []
+            layered_roads[road.layer].append(road)
+
+        for layer in sorted(layered_roads.keys()):
+            roads = layered_roads[layer]
             for road in roads:
                 road.draw(self.svg, self.flinger, road.matcher.border_color, 2)
             for road in roads:

map_machine/scheme.py

@@ -287,6 +287,12 @@ class RoadMatcher(Matcher):
         if "priority" in structure:
             self.priority = structure["priority"]
 
+    def get_priority(self, tags: dict[str, str]) -> float:
+        layer: float = 0
+        if "layer" in tags:
+            layer = float(tags.get("layer"))
+        return 1000 * layer + self.priority
+
 
 class Scheme:
     """