diff --git a/app/src/main/java/de/westnordost/streetcomplete/quests/max_height/AddMaxHeight.kt b/app/src/main/java/de/westnordost/streetcomplete/quests/max_height/AddMaxHeight.kt
index d288d6335a..60b79cc464 100644
--- a/app/src/main/java/de/westnordost/streetcomplete/quests/max_height/AddMaxHeight.kt
+++ b/app/src/main/java/de/westnordost/streetcomplete/quests/max_height/AddMaxHeight.kt
@@ -117,7 +117,7 @@ class AddMaxHeight : OsmElementQuestType<MaxHeightAnswer> {
 
             // applicable if with any bridge...
             geometry != null && bridges.any { bridge ->
-                val bridgeGeometry = mapData.getWayGeometry(bridge.id) as? ElementPolylinesGeometry
+                val bridgeGeometry = mapData.getWayGeometry(bridge.id)
                 val bridgeLayer = bridge.tags["layer"]?.toIntOrNull() ?: 0
 
                 // , that is in a layer above this way
diff --git a/app/src/main/java/de/westnordost/streetcomplete/util/math/ElementGeometryMath.kt b/app/src/main/java/de/westnordost/streetcomplete/util/math/ElementGeometryMath.kt
index e41d4327d6..af9935b470 100644
--- a/app/src/main/java/de/westnordost/streetcomplete/util/math/ElementGeometryMath.kt
+++ b/app/src/main/java/de/westnordost/streetcomplete/util/math/ElementGeometryMath.kt
@@ -1,16 +1,31 @@
 package de.westnordost.streetcomplete.util.math
 
+import de.westnordost.streetcomplete.data.osm.geometry.ElementGeometry
+import de.westnordost.streetcomplete.data.osm.geometry.ElementPointGeometry
+import de.westnordost.streetcomplete.data.osm.geometry.ElementPolygonsGeometry
 import de.westnordost.streetcomplete.data.osm.geometry.ElementPolylinesGeometry
+import de.westnordost.streetcomplete.data.osm.mapdata.LatLon
 
 fun ElementPolylinesGeometry.getOrientationAtCenterLineInDegrees(): Float {
     val centerLine = polylines.first().centerLineOfPolyline()
     return centerLine.first.initialBearingTo(centerLine.second).toFloat()
 }
 
-fun ElementPolylinesGeometry.intersects(other: ElementPolylinesGeometry): Boolean =
-    getBounds().intersect(other.getBounds())
-    && polylines.any { polyline ->
-        other.polylines.any { otherPolyline ->
+fun ElementGeometry.intersects(other: ElementGeometry): Boolean {
+    // not interested in point geometry here
+    if (this is ElementPointGeometry || other is ElementPointGeometry) return false
+
+    if (!getBounds().intersect(other.getBounds())) return false
+
+    return asList().any { polyline ->
+        other.asList().any { otherPolyline ->
             polyline.intersectsWith(otherPolyline)
         }
     }
+}
+
+private fun ElementGeometry.asList(): List<List<LatLon>> = when (this) {
+    is ElementPointGeometry -> listOf(listOf(center))
+    is ElementPolygonsGeometry -> polygons
+    is ElementPolylinesGeometry -> polylines
+}