diff --git a/mCRL2/TrafficLights/v4/v4_spec.lps b/mCRL2/TrafficLights/v4/v4_spec.lps
index cfc93b3..a184cb0 100644
Binary files a/mCRL2/TrafficLights/v4/v4_spec.lps and b/mCRL2/TrafficLights/v4/v4_spec.lps differ
diff --git a/mCRL2/TrafficLights/v4/v4_spec.lts b/mCRL2/TrafficLights/v4/v4_spec.lts
index ee795b2..a3fd64c 100644
Binary files a/mCRL2/TrafficLights/v4/v4_spec.lts and b/mCRL2/TrafficLights/v4/v4_spec.lts differ
diff --git a/mCRL2/TrafficLights/v4/v4_spec.mcrl2 b/mCRL2/TrafficLights/v4/v4_spec.mcrl2
index 3794ae5..00e0a77 100644
--- a/mCRL2/TrafficLights/v4/v4_spec.mcrl2
+++ b/mCRL2/TrafficLights/v4/v4_spec.mcrl2
@@ -39,7 +39,8 @@ act
 	changedLight: Colour;
 	changeDirection: CardinalDirection;
 	changedDirection: CardinalDirection;
-	emptyAct;
+	wait;
+	proceed;
 	
 %------------------------------------------------------------------------
 
@@ -52,7 +53,7 @@ proc
 		<> %ansonsten
 			show(direction, colour) . %aktuellen Zustand zeigen
 			(colour == red) %wenn rot
-				-> ChangeDirection(direction) %Richtungswechsel, wenn wieder zurück
+				-> wait . ChangeDirection(direction) %Richtungswechsel, wenn wieder zurück
 					. ChangeLight(direction, colour) % -> zur nächsten Farbe wechseln.
 				<> ChangeLight(direction, colour) %ansonsten zum nächsten Zustand wechseln.
 		
@@ -69,22 +70,27 @@ proc
 	;
 
 	System =
+		hide({%unnötige Informationen verstecken
+			proceed,
+			changedDirection,
+			changedLight
+		},
 		allow({
 			show,
-			%changeLight,
 			changedLight,
-			%changeDirection, 
 			changedDirection,
-			emptyAct
+			proceed
 		},
 		comm({
 			changeDirection | changeDirection -> changedDirection,
-			changeLight | changeLight -> changedLight
+			changeLight | changeLight -> changedLight,
+			wait | wait -> proceed
 		},
+		
 
 		TrafficLight(north) || TrafficLight(east) || TrafficLight(south) || TrafficLight(west) || changeDirection(north) || changeDirection(south)
 		%starten der Prozesse und auslösen des ersten Richtungswechsels
-	));
+	)));
 
 init
 	  System