--- a/road_cmd.c	Mon May 09 22:33:00 2005 +0000
+++ b/road_cmd.c	Tue May 10 08:45:55 2005 +0000
@@ -623,7 +623,7 @@
 
 	SET_EXPENSES_TYPE(EXPENSES_CONSTRUCTION);
 
-	if (p2 > 3) return CMD_ERROR; // check direction
+	if (p1 > 3) return CMD_ERROR; // check direction
 
 	FindLandscapeHeight(&ti, x, y);