diff --git a/src/pbs.cpp b/src/pbs.cpp
--- a/src/pbs.cpp
+++ b/src/pbs.cpp
@@ -329,8 +329,8 @@ bool IsSafeWaitingPosition(const Vehicle
 
 	/* Check for reachable tracks. */
 	ft.m_new_td_bits &= DiagdirReachesTrackdirs(ft.m_exitdir);
+	if (forbid_90deg) ft.m_new_td_bits &= ~TrackdirCrossesTrackdirs(trackdir);
 	if (ft.m_new_td_bits == TRACKDIR_BIT_NONE) return include_line_end;
-	if (forbid_90deg) ft.m_new_td_bits &= ~TrackdirCrossesTrackdirs(trackdir);
 
 	if (ft.m_new_td_bits != TRACKDIR_BIT_NONE && KillFirstBit(ft.m_new_td_bits) == TRACKDIR_BIT_NONE) {
 		/* PBS signal on next trackdir? Safe position. */
diff --git a/src/yapf/yapf_costrail.hpp b/src/yapf/yapf_costrail.hpp
--- a/src/yapf/yapf_costrail.hpp
+++ b/src/yapf/yapf_costrail.hpp
@@ -437,8 +437,8 @@ no_entry_cost: // jump here at the begin
 					end_segment_reason |= ESRB_DEAD_END;
 				}
 
-				if (TrackFollower::DoTrackMasking() && tf_local.m_err != TrackFollower::EC_90DEG) {
-					if (!HasOnewaySignalBlockingTrackdir(cur.tile, cur.td)) end_segment_reason |= ESRB_SAFE_TILE;
+				if (TrackFollower::DoTrackMasking() && !HasOnewaySignalBlockingTrackdir(cur.tile, cur.td)) {
+					end_segment_reason |= ESRB_SAFE_TILE;
 				}
 				break;
 			}
diff --git a/src/yapf/yapf_destrail.hpp b/src/yapf/yapf_destrail.hpp
--- a/src/yapf/yapf_destrail.hpp
+++ b/src/yapf/yapf_destrail.hpp
@@ -85,8 +85,8 @@ public:
 	FORCEINLINE bool PfDetectDestination(TileIndex tile, Trackdir td)
 	{
 		return
-			IsSafeWaitingPosition(Yapf().GetVehicle(), tile, td, true, TrackFollower::Allow90degTurns()) &&
-			IsWaitingPositionFree(Yapf().GetVehicle(), tile, td, TrackFollower::Allow90degTurns());
+			IsSafeWaitingPosition(Yapf().GetVehicle(), tile, td, true, !TrackFollower::Allow90degTurns()) &&
+			IsWaitingPositionFree(Yapf().GetVehicle(), tile, td, !TrackFollower::Allow90degTurns());
 	}
 
 	/** Called by YAPF to calculate cost estimate. Calculates distance to the destination