diff --git a/src/micropolisj/engine/TileConstants.java b/src/micropolisj/engine/TileConstants.java
index b76be3e..2bb596e 100644
--- a/src/micropolisj/engine/TileConstants.java
+++ b/src/micropolisj/engine/TileConstants.java
@@ -65,14 +65,14 @@ public class TileConstants
 	public static final char VBRIDGE = 65;
 	public static final char ROADS = 66;
 	public static final char ROADS2 = 67;
-	public static final char ROADS3 = 68;
-	public static final char ROADS4 = 69;
-	public static final char ROADS5 = 70;
-	public static final char ROADS6 = 71;
-	public static final char ROADS7 = 72;
-	public static final char ROADS8 = 73;
-	public static final char ROADS9 = 74;
-	public static final char ROADS10 = 75;
+	private static final char ROADS3 = 68;
+	private static final char ROADS4 = 69;
+	private static final char ROADS5 = 70;
+	private static final char ROADS6 = 71;
+	private static final char ROADS7 = 72;
+	private static final char ROADS8 = 73;
+	private static final char ROADS9 = 74;
+	private static final char ROADS10 = 75;
 	public static final char INTERSECTION = 76;
 	public static final char HROADPOWER = 77;
 	public static final char VROADPOWER = 78;
@@ -87,14 +87,14 @@ public class TileConstants
 	public static final char LHPOWER = 210;
 	public static final char LVPOWER = 211;
 	public static final char LVPOWER2 = 212;
-	public static final char LVPOWER3 = 213;
-	public static final char LVPOWER4 = 214;
-	public static final char LVPOWER5 = 215;
-	public static final char LVPOWER6 = 216;
-	public static final char LVPOWER7 = 217;
-	public static final char LVPOWER8 = 218;
-	public static final char LVPOWER9 = 219;
-	public static final char LVPOWER10 = 220;
+	private static final char LVPOWER3 = 213;
+	private static final char LVPOWER4 = 214;
+	private static final char LVPOWER5 = 215;
+	private static final char LVPOWER6 = 216;
+	private static final char LVPOWER7 = 217;
+	private static final char LVPOWER8 = 218;
+	private static final char LVPOWER9 = 219;
+	private static final char LVPOWER10 = 220;
 	public static final char RAILHPOWERV = 221;
 	public static final char RAILVPOWERH = 222;
 	public static final char LASTPOWER = 222;
@@ -104,14 +104,14 @@ public class TileConstants
 	public static final char LHRAIL = 226;
 	public static final char LVRAIL = 227;
 	public static final char LVRAIL2 = 228;
-	public static final char LVRAIL3 = 229;
-	public static final char LVRAIL4 = 230;
-	public static final char LVRAIL5 = 231;
-	public static final char LVRAIL6 = 232;
-	public static final char LVRAIL7 = 233;
-	public static final char LVRAIL8 = 234;
-	public static final char LVRAIL9 = 235;
-	public static final char LVRAIL10 = 236;
+	private static final char LVRAIL3 = 229;
+	private static final char LVRAIL4 = 230;
+	private static final char LVRAIL5 = 231;
+	private static final char LVRAIL6 = 232;
+	private static final char LVRAIL7 = 233;
+	private static final char LVRAIL8 = 234;
+	private static final char LVRAIL9 = 235;
+	private static final char LVRAIL10 = 236;
 	public static final char HRAILROAD = 237;
 	public static final char VRAILROAD = 238;
 	public static final char LASTRAIL = 238;
@@ -126,20 +126,20 @@ public class TileConstants
 	public static final char COMBASE = 423;
 	public static final char COMCLR = 427;
 	public static final char CZB = 436; //commercial zone base
-	public static final char COMLAST = 609;
+	private static final char COMLAST = 609;
 	public static final char INDBASE = 612;
 	public static final char INDCLR = 616;
-	public static final char LASTIND = 620;
-	public static final char IND1 = 621;
+	private static final char LASTIND = 620;
+	private static final char IND1 = 621;
 	public static final char IZB = 625;
 	public static final char PORTBASE = 693;
 	public static final char PORT = 698;
-	public static final char LASTPORT = 708;
+	private static final char LASTPORT = 708;
 	public static final char AIRPORTBASE = 709;
 	public static final char AIRPORT = 716;
 	public static final char COALBASE = 745;
 	public static final char POWERPLANT = 750;
-	public static final char LASTPOWERPLANT = 760;
+	private static final char LASTPOWERPLANT = 760;
 	public static final char FIRESTBASE = 761;
 	public static final char FIRESTATION = 765;
 	public static final char POLICESTBASE = 770;
@@ -155,13 +155,13 @@ public class TileConstants
 	public static final char HBRDG1 = 829;
 	public static final char HBRDG2 = 830;
 	public static final char HBRDG3 = 831;
-	public static final char RADAR_ANIM = 832;
+	private static final char RADAR_ANIM = 832;
 	public static final char FOUNTAIN = 840;
-	public static final char INDBASE2 = 844;
+	private static final char INDBASE2 = 844;
 	private static final char SMOKEBASE = 852;
 	public static final char TINYEXP = 860;
-	public static final char SOMETINYEXP = 864;
-	public static final char LASTTINYEXP = 867;
+	private static final char SOMETINYEXP = 864;
+	private static final char LASTTINYEXP = 867;
 	private static final char SMOKEBASE2 = 884;
 	public static final char FOOTBALLGAME1 = 932;
 	public static final char FOOTBALLGAME2 = 940;
@@ -169,7 +169,7 @@ public class TileConstants
 	public static final char VBRDG1 = 949;
 	public static final char VBRDG2 = 950;
 	public static final char VBRDG3 = 951;
-	public static final char URANIUM_FUEL = 952;
+	private static final char URANIUM_FUEL = 952;
 	public static final char LAST_TILE = 956;
 
 	static final char [] RoadTable = new char[] {