--- a/src/rail_cmd.cpp	Sat Aug 02 22:48:01 2008 +0000
+++ b/src/rail_cmd.cpp	Sat Aug 02 22:48:14 2008 +0000
@@ -504,6 +504,7 @@
 					}
 				} else {
 					SetTrackBits(tile, present);
+					SetTrackReservation(tile, GetTrackReservation(tile) & present);
 				}
 			}
 			break;