diff --git a/ai/ai_event.h b/ai/ai_event.h
--- a/ai/ai_event.h
+++ b/ai/ai_event.h
@@ -53,6 +53,8 @@ DEF_EVENTS int ottd_Event_VehicleEnterDe
 DEF_EVENTS int ottd_Event_RoadVehicleEnterDepot				INITIAL_SET; // (vehicle_index, depot_tile)
 
 DEF_EVENTS int ottd_Event_GiveOrder										INITIAL_SET; // (vehicle_index)
+
+DEF_EVENTS int ottd_Event_BuildRoad										INITIAL_SET; // (road_tile, road_pieces)
 /* ----------------- End of list ------------------ */
 
 #endif /* AI_EVENT */
diff --git a/road_cmd.c b/road_cmd.c
--- a/road_cmd.c
+++ b/road_cmd.c
@@ -487,6 +487,8 @@ do_clear:;
 		_m[tile].m5 |= pieces;
 
 		MarkTileDirtyByTile(tile);
+
+		ai_event(_current_player, ottd_Event_BuildRoad, tile, pieces);
 	}
 	return cost;
 }