@@ -1139,9 +1139,9 @@ CommandCost CmdBuildSingleSignal(TileInd
DirtyCompanyInfrastructureWindows(GetTileOwner(tile));
if (IsPbsSignal(sigtype)) {
/* PBS signals should show red unless they are on a reservation. */
/* PBS signals should show red unless they are on reserved tiles without a train. */
uint mask = GetPresentSignals(tile) & SignalOnTrack(track);
SetSignalStates(tile, (GetSignalStates(tile) & ~mask) | ((HasBit(GetRailReservationTrackBits(tile), track) ? UINT_MAX : 0) & mask));
SetSignalStates(tile, (GetSignalStates(tile) & ~mask) | ((HasBit(GetRailReservationTrackBits(tile), track) && EnsureNoVehicleOnGround(tile).Succeeded() ? UINT_MAX : 0) & mask));
}
MarkTileDirtyByTile(tile);
AddTrackToSignalBuffer(tile, track, _current_company);