diff --git a/src/widgets/rail_widget.h b/src/widgets/rail_widget.h
--- a/src/widgets/rail_widget.h
+++ b/src/widgets/rail_widget.h
@@ -98,14 +98,8 @@ enum BuildSignalWidgets : WidgetID {
 	WID_BS_DRAG_SIGNALS_DENSITY_LABEL,    ///< The current signal density.
 	WID_BS_DRAG_SIGNALS_DENSITY_DECREASE, ///< Decrease the signal density.
 	WID_BS_DRAG_SIGNALS_DENSITY_INCREASE, ///< Increase the signal density.
-	WID_BS_SEMAPHORE_NORM_SEL,  ///< NWID_SELECTION for WID_BS_SEMAPHORE_NORM.
-	WID_BS_ELECTRIC_NORM_SEL,   ///< NWID_SELECTION for WID_BS_ELECTRIC_NORM.
-	WID_BS_SEMAPHORE_ENTRY_SEL, ///< NWID_SELECTION for WID_BS_SEMAPHORE_ENTRY.
-	WID_BS_ELECTRIC_ENTRY_SEL,  ///< NWID_SELECTION for WID_BS_ELECTRIC_ENTRY.
-	WID_BS_SEMAPHORE_EXIT_SEL,  ///< NWID_SELECTION for WID_BS_SEMAPHORE_EXIT.
-	WID_BS_ELECTRIC_EXIT_SEL,   ///< NWID_SELECTION for WID_BS_ELECTRIC_EXIT.
-	WID_BS_SEMAPHORE_COMBO_SEL, ///< NWID_SELECTION for WID_BS_SEMAPHORE_COMBO.
-	WID_BS_ELECTRIC_COMBO_SEL,  ///< NWID_SELECTION for WID_BS_ELECTRIC_COMBO.
+	WID_BS_BLOCK_SEL,           ///< Container for the block signal group, which can be hidden.
+	WID_BS_BLOCK_SPACER_SEL,    ///< Container for the spacer between block and path signal groups, which can be hidden.
 };
 
 /** Widgets of the #BuildRailDepotWindow class. */