Actually revert this change, it's not better.

lib/rmg/modificators/RoadPlacer.cpp

@@ -175,7 +175,7 @@ void RoadPlacer::drawRoads(bool secondary)
 void RoadPlacer::addRoadNode(const int3& node)
 {
 	RecursiveLock lock(externalAccessMutex);
-	roadNodes.push_back(node);
+	roadNodes.insert(node);
 }
 
 void RoadPlacer::connectRoads()

lib/rmg/modificators/RoadPlacer.h

@@ -37,7 +37,7 @@ protected:
 	void drawRoads(bool secondary = false); //actually updates tiles
 
 protected:
-	std::vector<int3> roadNodes; //tiles to be connected with roads
+	rmg::Tileset roadNodes; //tiles to be connected with roads
 	rmg::Area roads; //all tiles with roads
 	rmg::Area areaRoads;
 	rmg::Area isolated;