diff --git a/src/model/scenery.js b/src/model/scenery.js
index 2b4b9da..6cb3264 100644
--- a/src/model/scenery.js
+++ b/src/model/scenery.js
@@ -102,6 +102,11 @@ export default class Scenery
                 return Scenery._parseMisc(text);
             case 'Empty':
             case 'EndRoute':
+            case 'MiscGroup':
+            case 'EndMiscGroup':
+            case 'Wires':
+            case 'Fence':
+            case 'TerrainPoint':
                 return null;
             default:
                 SceneryParserLog.warn('unknownObjectType', `Unknown object type: ${type}`);
diff --git a/src/model/signal.js b/src/model/signal.js
index 0e8ba3b..0138820 100644
--- a/src/model/signal.js
+++ b/src/model/signal.js
@@ -57,6 +57,7 @@ export default class Signal extends TrackObject {
         if(values.length < 29) return false;
         
         const prefabInfo = values[2].split(",");
+        if(/^sk\d+_[a-zA-Z]+$/.test(prefabInfo[0])) return true; // mechanical signals
         if(prefabInfo.length < 2) return false;
 
         return true;
diff --git a/tools/scp.py b/tools/scp.py
index e39c403..bbd814a 100644
--- a/tools/scp.py
+++ b/tools/scp.py
@@ -4,7 +4,7 @@ import sys
 #
 #    [ TD2 SCENERY PROCESSOR ]
 #    by masuo
-#    v1.3
+#    v1.4
 #
 
 BAD_WORDS = ['Empty,Empty', 'Forest Start,Forest Start', 'EndMiscGroup', 'Fence', 'TerrainPoint', 'Wires']
@@ -16,7 +16,7 @@ def should_exclude(line: str) -> bool:
     
     if line.startswith("Misc"):
         values = line.split(';')
-        return len(values[9].strip()) == 0 or not values[2].startswith("SignalBox")
+        return not values[2].startswith("SignalBox")
 
 def process_file(file_path: str):
     if not file_path.endswith(".sc"):