diff --git a/src/newgrf.cpp b/src/newgrf.cpp
--- a/src/newgrf.cpp
+++ b/src/newgrf.cpp
@@ -4059,6 +4059,7 @@ static ChangeInfoResult IgnoreObjectProp
 		case 0x14:
 		case 0x16:
 		case 0x17:
+		case 0x18:
 			buf->ReadByte();
 			break;
 
@@ -4761,16 +4762,22 @@ static ChangeInfoResult IgnoreRoadStopPr
 	switch (prop) {
 		case 0x09:
 		case 0x0C:
+		case 0x0F:
+		case 0x11:
 			buf->ReadByte();
 			break;
 
 		case 0x0A:
 		case 0x0B:
+		case 0x0E:
+		case 0x10:
+		case 0x15:
 			buf->ReadWord();
 			break;
 
 		case 0x08:
 		case 0x0D:
+		case 0x12:
 			buf->ReadDWord();
 			break;