diff --git a/src/table/newgrf_debug_data.h b/src/table/newgrf_debug_data.h
index 008d52fbf7..c11ee335e0 100644
--- a/src/table/newgrf_debug_data.h
+++ b/src/table/newgrf_debug_data.h
@@ -2207,7 +2207,6 @@ class NIHTraceRestrict : public NIHelper {
 		CA(TRAIN_NOT_STUCK)
 		CA(CHANGE_COUNTER)
 		CA(NO_PBS_BACK_PENALTY)
-		CA(SLOT_ACQUIRE_ON_RES)
 		CA(SPEED_ADAPTATION)
 		CA(PBS_RES_END_SIMULATE)
 		CA(RESERVE_THROUGH_ALWAYS)
diff --git a/src/tracerestrict.h b/src/tracerestrict.h
index 405349af60..8a1353ffae 100644
--- a/src/tracerestrict.h
+++ b/src/tracerestrict.h
@@ -470,7 +470,6 @@ enum TraceRestrictProgramActionsUsedFlags {
 	TRPAUF_TRAIN_NOT_STUCK        = 1 << 11, ///< Train is not stuck
 	TRPAUF_CHANGE_COUNTER         = 1 << 12, ///< Change counter value is present
 	TRPAUF_NO_PBS_BACK_PENALTY    = 1 << 13, ///< No PBS back penalty is present
-	TRPAUF_SLOT_ACQUIRE_ON_RES    = 1 << 14, ///< Slot acquire (on reserve) action is present
 	TRPAUF_SPEED_ADAPTATION       = 1 << 15, ///< Speed adaptation control
 	TRPAUF_PBS_RES_END_SIMULATE   = 1 << 16, ///< PBS reservations ending at this signal slot changes must be fully simulated in dry run mode
 	TRPAUF_RESERVE_THROUGH_ALWAYS = 1 << 17, ///< Reserve through action is unconditionally set
@@ -490,7 +489,6 @@ enum TraceRestrictProgramInputSlotPermissions : uint8_t {
 	TRPISP_PBS_RES_END_ACQ_DRY    = 1 << 4,  ///< Dry-run slot acquire (PBS reservations ending at this signal) is permitted
 	TRPISP_PBS_RES_END_RELEASE    = 1 << 5,  ///< Slot release (PBS reservations ending at this signal) is permitted
 	TRPISP_CHANGE_COUNTER         = 1 << 6,  ///< Change counter value is permitted
-	TRPISP_ACQUIRE_ON_RES         = 1 << 7,  ///< Slot acquire (reserving route) is permitted
 };
 DECLARE_ENUM_AS_BIT_SET(TraceRestrictProgramInputSlotPermissions)
 
diff --git a/src/train_cmd.cpp b/src/train_cmd.cpp
index 67c5e74881..4c8bc9b2a4 100644
--- a/src/train_cmd.cpp
+++ b/src/train_cmd.cpp
@@ -4264,10 +4264,10 @@ static void TryLongReserveChooseTrainTrack(Train *v, TileIndex tile, Trackdir td
 						long_reserve = (out.flags & TRPRF_LONG_RESERVE);
 					}
 					if (!long_reserve) return;
-					if (prog != nullptr && prog->actions_used_flags & (TRPAUF_WAIT_AT_PBS | TRPAUF_SLOT_ACQUIRE | TRPAUF_SLOT_ACQUIRE_ON_RES)) {
+					if (prog != nullptr && prog->actions_used_flags & (TRPAUF_WAIT_AT_PBS | TRPAUF_SLOT_ACQUIRE)) {
 						TraceRestrictProgramResult out;
 						TraceRestrictProgramInput input(exit_tile, exit_td, nullptr, nullptr);
-						input.permitted_slot_operations = TRPISP_ACQUIRE | TRPISP_ACQUIRE_ON_RES;
+						input.permitted_slot_operations = TRPISP_ACQUIRE;
 						prog->Execute(v, input, out);
 						if (out.flags & TRPRF_WAIT_AT_PBS) {
 							return;
@@ -4373,10 +4373,10 @@ static Track ChooseTrainTrack(Train *v, TileIndex tile, DiagDirection enterdir,
 		if (track != INVALID_TRACK && HasPbsSignalOnTrackdir(tile, TrackEnterdirToTrackdir(track, enterdir)) && !IsNoEntrySignal(tile, track)) {
 			if (IsRestrictedSignal(tile) && v->force_proceed != TFP_SIGNAL) {
 				const TraceRestrictProgram *prog = GetExistingTraceRestrictProgram(tile, track);
-				if (prog && prog->actions_used_flags & (TRPAUF_WAIT_AT_PBS | TRPAUF_SLOT_ACQUIRE | TRPAUF_SLOT_ACQUIRE_ON_RES | TRPAUF_TRAIN_NOT_STUCK)) {
+				if (prog && prog->actions_used_flags & (TRPAUF_WAIT_AT_PBS | TRPAUF_SLOT_ACQUIRE | TRPAUF_TRAIN_NOT_STUCK)) {
 					TraceRestrictProgramResult out;
 					TraceRestrictProgramInput input(tile, TrackEnterdirToTrackdir(track, enterdir), nullptr, nullptr);
-					input.permitted_slot_operations = TRPISP_ACQUIRE | TRPISP_ACQUIRE_ON_RES;
+					input.permitted_slot_operations = TRPISP_ACQUIRE;
 					prog->Execute(v, input, out);
 					if (out.flags & TRPRF_TRAIN_NOT_STUCK && !(v->track & TRACK_BIT_WORMHOLE) && !(v->track == TRACK_BIT_DEPOT)) {
 						v->wait_counter = 0;
@@ -5245,10 +5245,10 @@ static bool CheckTrainStayInWormHolePathReserve(Train *t, TileIndex tile)
 	auto try_exit_reservation = [&]() -> bool {
 		if (IsTunnelBridgeRestrictedSignal(tile)) {
 			const TraceRestrictProgram *prog = GetExistingTraceRestrictProgram(tile, TrackdirToTrack(td));
-			if (prog && prog->actions_used_flags & (TRPAUF_WAIT_AT_PBS | TRPAUF_SLOT_ACQUIRE | TRPAUF_SLOT_ACQUIRE_ON_RES)) {
+			if (prog && prog->actions_used_flags & (TRPAUF_WAIT_AT_PBS | TRPAUF_SLOT_ACQUIRE)) {
 				TraceRestrictProgramResult out;
 				TraceRestrictProgramInput input(tile, td, nullptr, nullptr);
-				input.permitted_slot_operations = TRPISP_ACQUIRE | TRPISP_ACQUIRE_ON_RES;
+				input.permitted_slot_operations = TRPISP_ACQUIRE;
 				prog->Execute(t, input, out);
 				if (out.flags & TRPRF_WAIT_AT_PBS) {
 					return false;