diff --git a/CMakeLists.txt b/CMakeLists.txt
index d012efe2..411e34ca 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -30,6 +30,13 @@ file(GLOB HEADERS "*.h"
 "network/backend/*.h"
 "widgets/*.h")
 
+if (APPLE)
+	set (CMAKE_EXE_LINKER_FLAGS "-pagezero_size 10000 -image_base 100000000")
+endif()
+
+option(USE_IMGUI_GL3 "Use OpenGL3+ imgui implementation" ON)
+option(WITH_UART "Compile with libserialport" ON)
+
 set(SOURCES
 "Texture.cpp"
 "Timer.cpp"
@@ -86,7 +93,6 @@ set(SOURCES
 "material.cpp"
 "lua.cpp"
 "stdafx.cpp"
-"uart.cpp"
 "messaging.cpp"
 "scene.cpp"
 "scenenode.cpp"
@@ -117,6 +123,7 @@ set(SOURCES
 "simulationstateserializer.cpp"
 "precipitation.cpp"
 "pythonscreenviewer.cpp"
+"dictionary.cpp"
 
 "network/network.cpp"
 "network/message.cpp"
@@ -157,8 +164,6 @@ set(SOURCES
 "extras/VS_Dev.cpp"
 )
 
-option(USE_IMGUI_GL3 "Use OpenGL3+ imgui implementation" ON)
-
 if (USE_IMGUI_GL3)
 	set(SOURCES ${SOURCES} "imgui/imgui_impl_opengl3.cpp")
 else()
@@ -166,15 +171,20 @@ else()
 	set(SOURCES ${SOURCES} "imgui/imgui_impl_opengl2.cpp")
 endif()
 
+if (WITH_UART)
+	add_definitions(-DWITH_UART)
+	set(SOURCES ${SOURCES} "uart.cpp")
+endif()
+
 set (PREFIX "")
 
 if (WIN32)
 	add_definitions(-DHAVE_ROUND) # to make pymath to not redefine round
-	add_definitions(-DEU07_BUILD_STATIC) # to make pymath to not redefine round
+	add_definitions(-DGLFW_DLL)
 
 	set(SOURCES ${SOURCES} "windows.cpp" "Console.cpp" "Console/LPT.cpp" "Console/PoKeys55.cpp")
 	set(GLFW3_INCLUDE_DIR ${GLFW3_INCLUDE_DIR} "${DEPS_DIR}/glfw/include/")
-	set(PNG_PNG_INCLUDE_DIR ${PNG_PNG_INCLUDE_DIR} "${DEPS_DIR}/libpng/include/")
+	set(PNG_INCLUDE_DIRS ${PNG_INCLUDE_DIRS} "${DEPS_DIR}/libpng/include/")
 	set(ZLIB_INCLUDE_DIR ${ZLIB_INCLUDE_DIR} "${DEPS_DIR}/zlib/")
 	set(OPENAL_INCLUDE_DIR ${OPENAL_INCLUDE_DIR} "${DEPS_DIR}/openal/include")
 	set(LIBSNDFILE_INCLUDE_DIR ${LIBSNDFILE_INCLUDE_DIR} "${DEPS_DIR}/libsndfile/include")
@@ -190,12 +200,12 @@ if (WIN32)
 
 	set (PREFIX "-${ARCH}")
 
-	set(GLFW3_LIBRARIES ${GLFW3_LIBRARIES} "${DEPS_DIR}/glfw/lib/${ARCH}/glfw3.lib")
-	set(PNG_LIBRARY ${PNG_LIBRARY} "${DEPS_DIR}/libpng/lib/${ARCH}/libpng16.lib")
+	set(GLFW3_LIBRARIES ${GLFW3_LIBRARIES} "${DEPS_DIR}/glfw/lib/${ARCH}/glfw3dll.lib")
+	set(PNG_LIBRARIES ${PNG_LIBRARIES} "${DEPS_DIR}/libpng/lib/${ARCH}/libpng16.lib")
 	set(OPENAL_LIBRARY ${OPENAL_LIBRARY} "${DEPS_DIR}/openal/lib/${ARCH}/OpenAL32.lib")
 	set(LIBSNDFILE_LIBRARY ${LIBSNDFILE_LIBRARY} "${DEPS_DIR}/libsndfile/lib/${ARCH}/libsndfile-1.lib")
 	set(LUAJIT_LIBRARIES ${LUAJIT_LIBRARIES} "${DEPS_DIR}/luajit/lib/${ARCH}/lua51.lib")
-	set(PYTHON_LIBRARY ${PYTHON_LIBRARY} "${DEPS_DIR}/python/lib/${ARCH}/python27.lib")	
+	set(PYTHON_LIBRARY ${PYTHON_LIBRARY} "${DEPS_DIR}/python/lib/${ARCH}/python27.lib")
 	set(libserialport_LIBRARY ${LIBSERIALPORT_LIBRARY} "${DEPS_DIR}/libserialport/lib/${ARCH}/libserialport-0.lib")
 endif()
 
@@ -236,10 +246,12 @@ find_package(PythonLibs 2 REQUIRED)
 include_directories(${PYTHON_INCLUDE_DIRS})
 target_link_libraries(${PROJECT_NAME} ${PYTHON_LIBRARIES})
 
-find_package(PNG REQUIRED)
-include_directories(${PNG_INCLUDE_DIRS} ${PNG_PNG_INCLUDE_DIR})
+if (NOT WIN32)
+	find_package(PkgConfig REQUIRED)
+	pkg_check_modules(PNG libpng16 REQUIRED)
+endif()
+include_directories(${PNG_INCLUDE_DIRS})
 target_link_libraries(${PROJECT_NAME} ${PNG_LIBRARIES})
-target_link_libraries(${PROJECT_NAME} ${PNG_LIBRARY})
 
 find_package(Threads REQUIRED)
 target_link_libraries(${PROJECT_NAME} Threads::Threads)
@@ -259,9 +271,11 @@ find_package(LuaJIT REQUIRED)
 include_directories(${LUAJIT_INCLUDE_DIR})
 target_link_libraries(${PROJECT_NAME} ${LUAJIT_LIBRARIES})
 
-find_package(libserialport REQUIRED)
-include_directories(${libserialport_INCLUDE_DIR})
-target_link_libraries(${PROJECT_NAME} ${libserialport_LIBRARY})
+if (WITH_UART)
+	find_package(libserialport REQUIRED)
+	include_directories(${libserialport_INCLUDE_DIR})
+	target_link_libraries(${PROJECT_NAME} ${libserialport_LIBRARY})
+endif()
 
 find_package(ASIO REQUIRED)
 target_link_libraries(${PROJECT_NAME} ASIO::ASIO)
diff --git a/Classes.h b/Classes.h
index 30810a44..e5f98ad4 100644
--- a/Classes.h
+++ b/Classes.h
@@ -40,6 +40,7 @@ class powergridsource_table;
 class instance_table;
 class vehicle_table;
 struct light_array;
+struct dictionary_source;
 
 namespace scene {
 struct node_data;
diff --git a/Driver.cpp b/Driver.cpp
index 2c9038bf..0d5ef225 100644
--- a/Driver.cpp
+++ b/Driver.cpp
@@ -1373,7 +1373,7 @@ TCommandType TController::TableUpdate(double &fVelDes, double &fDist, double &fN
                         if( ( mvOccupied->Vel < v )
                          || ( v == 0.0 ) ) {
                             // if we're going slower than the target velocity and there's enough room for safe stop, speed up
-                            auto const brakingdistance = fBrakeDist * braking_distance_multiplier( v );
+                            auto const brakingdistance { 1.2 * fBrakeDist * braking_distance_multiplier( v ) };
                             if( brakingdistance > 0.0 ) {
                                 // maintain desired acc while we have enough room to brake safely, when close enough start paying attention
                                 // try to make a smooth transition instead of sharp change
@@ -1638,7 +1638,7 @@ TController::TController(bool AI, TDynamicObject *NewControll, bool InitPsyche,
     if( WriteLogFlag ) {
 #ifdef _WIN32
 		CreateDirectory( "physicslog", NULL );
-#elif __linux__
+#elif __unix__
         mkdir( "physicslog", 0644 );
 #endif
         LogFile.open( std::string( "physicslog/" + VehicleName + ".dat" ),
@@ -2125,6 +2125,11 @@ bool TController::CheckVehicles(TOrders user)
              && ( ( p->MoverParameters->Couplers[ end::rear ].CouplingFlag  & ( coupling::control ) ) == 0 ) ) {
                 // NOTE: don't set battery in the occupied vehicle, let the user/ai do it explicitly
                 p->MoverParameters->BatterySwitch( true );
+                // enable heating and converter in carriages with can be heated
+                if( p->MoverParameters->HeatingPower > 0 ) {
+                    p->MoverParameters->HeatingAllow = true;
+                    p->MoverParameters->ConverterSwitch( true, range_t::local );
+                }
             }
 
             if (p->asDestination == "none")
@@ -2356,6 +2361,7 @@ double TController::BrakeAccFactor() const
 	double Factor = 1.0;
 
     if( ( fAccThreshold != 0.0 )
+     && ( AccDesired < 0.0 )
      && ( ( ActualProximityDist > fMinProximityDist )
        || ( mvOccupied->Vel > VelDesired + fVelPlus ) ) ) {
         Factor += ( fBrakeReaction * ( /*mvOccupied->BrakeCtrlPosR*/BrakeCtrlPosition < 0.5 ? 1.5 : 1 ) ) * mvOccupied->Vel / ( std::max( 0.0, ActualProximityDist ) + 1 ) * ( ( AccDesired - AbsAccS_pub ) / fAccThreshold );
@@ -2525,9 +2531,9 @@ bool TController::PrepareEngine()
                 }
                 // sync virtual brake state with the 'real' one
                 std::unordered_map<int, int> const brakepositions {
-                    { mvOccupied->Handle->GetPos( bh_RP ), gbh_RP },
-                    { mvOccupied->Handle->GetPos( bh_NP ), gbh_NP },
-                    { mvOccupied->Handle->GetPos( bh_FS ), gbh_FS } };
+                    { static_cast<int>( mvOccupied->Handle->GetPos( bh_RP ) ), gbh_RP },
+                    { static_cast<int>( mvOccupied->Handle->GetPos( bh_NP ) ), gbh_NP },
+                    { static_cast<int>( mvOccupied->Handle->GetPos( bh_FS ) ), gbh_FS } };
                 auto const lookup { brakepositions.find( static_cast<int>( mvOccupied->fBrakeCtrlPos ) ) };
                 if( lookup != brakepositions.end() ) {
                     BrakeLevelSet( lookup->second ); // GBH
@@ -3545,7 +3551,7 @@ void TController::Doors( bool const Open, int const Side ) {
         }
 
         if( AIControllFlag ) {
-            if( ( true == mvOccupied->Doors.has_autowarning )
+            if( ( true == mvOccupied->Doors.has_warning )
              && ( false == mvOccupied->DepartureSignal )
              && ( true == TestFlag( iDrivigFlags, moveDoorOpened ) ) ) {
                 mvOccupied->signal_departure( true ); // załącenie bzyczka
@@ -4046,7 +4052,7 @@ bool TController::PutCommand( std::string NewCommand, double NewValue1, double N
     }
 
 	if (NewCommand == "SetSignal") {
-		TSignals signal = (TSignals)std::round(NewValue1);
+		TSignals signal = (TSignals)std::lrint(NewValue1);
 
 		mvOccupied->iLights[0] = 0;
 		mvOccupied->iLights[1] = 0;
@@ -4714,11 +4720,11 @@ TController::UpdateSituation(double dt) {
         // TODO: test if we can use the distances calculation from obey_train
         fMinProximityDist = std::min( 5 + iVehicles, 25 );
         fMaxProximityDist = std::min( 10 + iVehicles, 50 );
-/*
-        if( IsHeavyCargoTrain ) {
-            fMaxProximityDist *= 1.5;
+        // HACK: modern vehicles might brake slower at low speeds, increase safety margin as crude counter
+        if( mvControlling->EIMCtrlType > 0 ) {
+            fMinProximityDist += 5.0;
+            fMaxProximityDist += 5.0;
         }
-*/
         fVelPlus = 2.0; // dopuszczalne przekroczenie prędkości na ograniczeniu bez hamowania
         // margines prędkości powodujący załączenie napędu
         // były problemy z jazdą np. 3km/h podczas ładowania wagonów
@@ -5198,7 +5204,11 @@ TController::UpdateSituation(double dt) {
                                         20.0 ) ); // others
                         if( vel > VelDesired + fVelPlus ) {
                             // if going too fast force some prompt braking
-                            AccPreferred = std::min( -0.65, AccPreferred );
+                            AccPreferred = std::min(
+                                ( ( mvOccupied->CategoryFlag & 2 ) ?
+                                -0.65 : // cars
+                                -0.30 ), // others
+                                AccPreferred );
                         }
                     }
 
@@ -5710,11 +5720,11 @@ TController::UpdateSituation(double dt) {
                            || ( VelNext > vel - 40.0 ) ) ?
                                 fBrake_a0[ 0 ] * 0.8 :
                                 -fAccThreshold )
-                            / braking_distance_multiplier( VelNext ) ) {
+                            / ( 1.2 * braking_distance_multiplier( VelNext ) ) ) {
                             AccDesired = std::max( -0.06, AccDesired );
                         }
                     }
-                    else {
+                    if( AccDesired < -0.1 ) {
                         // i orientuj się szybciej, jeśli hamujesz
                         ReactionTime = 0.25;
                     }
@@ -5813,11 +5823,11 @@ TController::UpdateSituation(double dt) {
                         }
                     }
                 }
-                // yB: usunięte różne dziwne warunki, oddzielamy część zadającą od wykonawczej
-                // zwiekszanie predkosci
+                // yB: usunięte różne dziwne warunki, oddzielamy część zadającą od wykonawczej zwiekszanie predkosci
                 // Ra 2F1H: jest konflikt histerezy pomiędzy nastawioną pozycją a uzyskiwanym
                 // przyspieszeniem - utrzymanie pozycji powoduje przekroczenie przyspieszenia
-                if( ( AccDesired - AbsAccS > 0.01 ) ) {
+                if( ( AccDesired > -0.06 ) // don't add power if not asked for actual speed-up
+                 && ( AccDesired - AbsAccS > 0.05 ) ) {
                     // jeśli przyspieszenie pojazdu jest mniejsze niż żądane oraz...
                     if( vel < (
                         VelDesired == 1.0 ? // work around for trains getting stuck on tracks with speed limit = 1
@@ -5909,7 +5919,8 @@ TController::UpdateSituation(double dt) {
                             }
                         }
                     }
-                    if ((AccDesired < fAccGravity - 0.05) && (AbsAccS < AccDesired - fBrake_a1[0]*0.51)) {
+                    if ( ( AccDesired < fAccGravity - 0.05 )
+                    && ( ( AccDesired - fBrake_a1[0]*0.51 ) ) - AbsAccS > 0.05 ) {
                         // jak hamuje, to nie tykaj kranu za często
                         // yB: luzuje hamulec dopiero przy różnicy opóźnień rzędu 0.2
                         if( OrderCurrentGet() != Disconnect ) {
diff --git a/Driver.h b/Driver.h
index 1e4e5aed..6eb08318 100644
--- a/Driver.h
+++ b/Driver.h
@@ -415,10 +415,10 @@ private:
 // timetable
 // methods
 public:
-	const std::string &TrainName() const;
-private:
-	std::string Relation() const;
+    const std::string &TrainName() const;
     Mtable::TTrainParameters const * TrainTimetable() const;
+private:
+    std::string Relation() const;
     int StationIndex() const;
     int StationCount() const;
     bool IsStop() const;
diff --git a/DynObj.cpp b/DynObj.cpp
index 9ada45b1..a1e6d07f 100644
--- a/DynObj.cpp
+++ b/DynObj.cpp
@@ -162,6 +162,39 @@ void TAnim::Parovoz(){
     // animowanie tłoka i rozrządu parowozu
 };
 */
+
+
+void TDynamicObject::destination_data::deserialize( cParser &Input ) {
+
+    while( true == deserialize_mapping( Input ) ) {
+        ; // all work done by while()
+    }
+}
+
+bool TDynamicObject::destination_data::deserialize_mapping( cParser &Input ) {
+    // token can be a key or block end
+    auto const key { Input.getToken<std::string>( true, "\n\r\t  ,;[]" ) };
+
+    if( ( true == key.empty() ) || ( key == "}" ) ) { return false; }
+
+    if( key == "{" ) {
+        script = Input.getToken<std::string>();
+    }
+    else if( key == "update:" ) {
+        auto const value { Input.getToken<std::string>() };
+        // TODO: implement
+    }
+    else if( key == "instance:" ) {
+        instancing = Input.getToken<std::string>();
+    }
+    else if( key == "parameters:" ) {
+        parameters = Input.getToken<std::string>();
+    }
+
+    return true;
+}
+
+
 //---------------------------------------------------------------------------
 TDynamicObject * TDynamicObject::FirstFind(int &coupler_nr, int cf)
 { // szukanie skrajnego połączonego pojazdu w pociagu
@@ -918,6 +951,8 @@ void TDynamicObject::ABuLittleUpdate(double ObjSqrDist)
             btEndSignalsTab2.Turn( true );
             btnOn = true;
         }
+        // destination signs
+        update_destinations();
         // else btEndSignalsTab2.TurnOff();
         // McZapkie-181002: krecenie wahaczem (korzysta z kata obrotu silnika)
         if (iAnimType[ANIM_LEVERS])
@@ -1535,20 +1570,12 @@ void TDynamicObject::place_on_track(TTrack *Track, double fDist, bool Reversed)
 	    // Ra: pojazdy wstawiane są na tor początkowy, a potem przesuwane
 	case 2: // ustawianie osi na torze
 		Axle0.Init(Track, this, iDirection ? 1 : -1);
+		Axle0.Reset();
 		Axle0.Move((iDirection ? fDist : -fDist) + fAxleDistHalf, false);
 		Axle1.Init(Track, this, iDirection ? 1 : -1);
+		Axle1.Reset();
 		Axle1.Move((iDirection ? fDist : -fDist) - fAxleDistHalf, false); // false, żeby nie generować eventów
 		break;
-	case 4:
-		Axle0.Init(Track, this, iDirection ? 1 : -1);
-		Axle0.Move((iDirection ? fDist : -fDist) + (fAxleDistHalf + MoverParameters->ADist * 0.5), false);
-		Axle1.Init(Track, this, iDirection ? 1 : -1);
-		Axle1.Move((iDirection ? fDist : -fDist) - (fAxleDistHalf + MoverParameters->ADist * 0.5), false);
-		// Axle2.Init(Track,this,iDirection?1:-1);
-		// Axle2.Move((iDirection?fDist:-fDist)-(fAxleDistHalf-MoverParameters->ADist*0.5),false);
-		// Axle3.Init(Track,this,iDirection?1:-1);
-		// Axle3.Move((iDirection?fDist:-fDist)+(fAxleDistHalf-MoverParameters->ADist*0.5),false);
-		break;
 	}
 	// potrzebne do wyliczenia aktualnej pozycji; nie może być zero, bo nie przeliczy pozycji
 	// teraz jeszcze trzeba przypisać pojazdy do nowego toru, bo przesuwanie początkowe osi nie
@@ -1982,6 +2009,10 @@ TDynamicObject::Init(std::string Name, // nazwa pojazdu, np. "EU07-424"
             init_sections( mdLowPolyInt, nameprefix );
         }
     }
+    // destination sign 
+    if( mdModel ) {
+        init_destination( mdModel );
+    }
     // 'external_load' is an optional special section in the main model, pointing to submodel of external load
     if( mdModel ) {
         init_sections( mdModel, "external_load" );
@@ -2106,6 +2137,16 @@ TDynamicObject::init_sections( TModel3d const *Model, std::string const &Namepre
     return sectioncount;
 }
 
+bool
+TDynamicObject::init_destination( TModel3d *Model ) {
+
+    if( Model->GetSMRoot() == nullptr ) { return false; }
+
+    std::tie( DestinationSign.sign, DestinationSign.has_light ) = Model->GetSMRoot()->find_replacable4();
+
+    return DestinationSign.sign != nullptr;
+}
+
 void
 TDynamicObject::create_controller( std::string const Type, bool const Trainset ) {
 
@@ -2579,6 +2620,27 @@ na sprzęgach, opóźnienie działania hamulca itp. Oczywiście musi mieć to pe
 histerezę czasową, aby te tryby pracy nie przełączały się zbyt szybko.
 */
 
+void TDynamicObject::update_destinations() {
+
+    if( DestinationSign.sign == nullptr ) { return; }
+
+    DestinationSign.sign->fLight = (
+        ( ( DestinationSign.has_light ) && ( MoverParameters->Battery ) ) ?
+             2.0 :
+            -1.0 );
+
+    // jak są 4 tekstury wymienne, to nie zmieniać rozkładem
+    if( std::abs( m_materialdata.multi_textures ) >= 4 ) { return; }
+    // TODO: dedicated setting to discern electronic signs, instead of fallback on light presence
+    m_materialdata.replacable_skins[ 4 ] = (
+        ( ( DestinationSign.destination != null_handle )
+       && ( ( false == DestinationSign.has_light ) // physical destination signs remain up until manually changed
+         || ( ( true == MoverParameters->Battery ) // lcd signs are off without power
+           && ( ctOwner != nullptr ) ) ) ) ? // lcd signs are off for carriages without engine, potentially left on a siding
+            DestinationSign.destination :
+            DestinationSign.destination_off );
+}
+
 bool TDynamicObject::Update(double dt, double dt1)
 {
 	if (dt1 == 0.0)
@@ -4073,6 +4135,10 @@ void TDynamicObject::RenderSounds() {
     }
     if( volume > 0.05 ) {
         rscurve
+            .pitch(
+                true == rscurve.is_combined() ?
+                    MoverParameters->Vel * 0.01f :
+                    rscurve.m_frequencyoffset + rscurve.m_frequencyfactor * 1.f )
             .gain( 2.5 * volume )
             .play( sound_flags::exclusive | sound_flags::looping );
     }
@@ -4298,7 +4364,8 @@ void TDynamicObject::LoadMMediaFile( std::string const &TypeName, std::string co
                 }
 
                 // potentially set blank destination texture
-                DestinationSet( {}, {} );
+                DestinationSign.destination_off = DestinationFind( "nowhere" );
+//                DestinationSet( {}, {} );
 
                 if( GfxRenderer.Material( m_materialdata.replacable_skins[ 1 ] ).get_or_guess_opacity() == 0.0f ) {
                     // tekstura -1 z kanałem alfa - nie renderować w cyklu nieprzezroczystych
@@ -5595,6 +5662,15 @@ void TDynamicObject::LoadMMediaFile( std::string const &TypeName, std::string co
                     parser >> JointCabs;
                 }
 
+                else if( token == "pydestinationsign:" ) {
+                    DestinationSign.deserialize( parser );
+                    // supply vehicle folder as script path if none is provided
+                    if( ( false == DestinationSign.script.empty() )
+                     && ( substr_path( DestinationSign.script ).empty() ) ) {
+                        DestinationSign.script = asBaseDir + DestinationSign.script;
+                    }
+                }
+
             } while( token != "" );
 
         } // internaldata:
@@ -6142,45 +6218,92 @@ int TDynamicObject::RouteWish(TTrack *tr)
     return Mechanik ? Mechanik->CrossRoute(tr) : 0; // wg AI albo prosto
 };
 
-void TDynamicObject::DestinationSet(std::string to, std::string numer)
-{ // ustawienie stacji docelowej oraz wymiennej tekstury 4, jeśli istnieje plik
+void TDynamicObject::DestinationSet(std::string to, std::string numer) {
+    // ustawienie stacji docelowej oraz wymiennej tekstury 4, jeśli istnieje plik
     // w zasadzie, to każdy wagon mógłby mieć inną stację docelową
     // zwłaszcza w towarowych, pod kątem zautomatyzowania maewrów albo pracy górki
     // ale to jeszcze potrwa, zanim będzie możliwe, na razie można wpisać stację z
     // rozkładu
-    if( std::abs( m_materialdata.multi_textures ) >= 4 ) {
-        // jak są 4 tekstury wymienne, to nie zmieniać rozkładem
-        return;
-    }
-	numer = Bezogonkow(numer);
+
     asDestination = to;
-    to = Bezogonkow(to); // do szukania pliku obcinamy ogonki
-    if( true == to.empty() ) {
-        to = "nowhere";
+
+    if( std::abs( m_materialdata.multi_textures ) >= 4 ) { return; } // jak są 4 tekstury wymienne, to nie zmieniać rozkładem
+    if( DestinationSign.sign == nullptr )                { return; } // no sign submodel, no problem
+
+    // now see if we can find any version of the destination texture
+    std::vector<std::string> const destinations = {
+        numer, // try dedicated timetable sign first...
+        to }; // ...then generic destination sign
+
+    for( auto const &destination : destinations ) {
+
+        DestinationSign.destination = DestinationFind( destination );
+        if( DestinationSign.destination != null_handle ) {
+            // got what we wanted, we're done here
+            return;
+        }
     }
+    // if we didn't get static texture we might be able to make one
+    if( DestinationSign.script.empty() ) { return; } // no script so no way to make the texture
+    if( numer == "none" )                { return; } // blank or incomplete/malformed timetable, don't bother
+
+    std::string signrequest {
+          "make:"
+        + DestinationSign.script + "?"
+        // timetable include
+        + "$timetable=" + (
+            ctOwner == nullptr ?
+                MoverParameters->Name : // leading vehicle, can point to it directly
+                ctOwner->Vehicle()->MoverParameters->Name ) + "&" // owned vehicle, safer to point to owner as carriages can have identical names
+        // basic instancing string
+        // NOTE: underscore doesn't have any magic meaning for the time being, it's just less likely to conflict with regular dictionary keys
+        + "_id1=" + (
+            ctOwner != nullptr ? ctOwner->TrainName() :
+            Mechanik != nullptr ? Mechanik->TrainName() :
+            "none" ) }; // shouldn't get here but, eh
+    // TBD, TODO: replace instancing with support for variables in extra parameters string?
+    if( false == DestinationSign.instancing.empty() ) {
+        signrequest +=
+            "&_id2=" + (
+                DestinationSign.instancing == "name" ? MoverParameters->Name :
+                DestinationSign.instancing == "type" ? MoverParameters->TypeName :
+                "none" );
+    }
+    // optionl extra parameters
+    if( false == DestinationSign.parameters.empty() ) {
+        signrequest += "&" + DestinationSign.parameters;
+    }
+
+    DestinationSign.destination = GfxRenderer.Fetch_Material( signrequest );
+}
+
+material_handle TDynamicObject::DestinationFind( std::string Destination ) {
+
+    if( Destination.empty() ) { return null_handle; }
+
+    Destination = Bezogonkow( Destination ); // do szukania pliku obcinamy ogonki
     // destination textures are kept in the vehicle's directory so we point the current texture path there
     auto const currenttexturepath { Global.asCurrentTexturePath };
     Global.asCurrentTexturePath = asBaseDir;
     // now see if we can find any version of the texture
-    std::vector<std::string> destinations = {
-        numer + '@' + MoverParameters->TypeName,
-        numer,
-        to + '@' + MoverParameters->TypeName,
-        to,
-        "nowhere" + '@' + MoverParameters->TypeName,
-        "nowhere" };
+    std::vector<std::string> const destinations {
+        Destination + '@' + MoverParameters->TypeName,
+        Destination };
+
+    auto destinationhandle { null_handle };
 
     for( auto const &destination : destinations ) {
-
         auto material = TextureTest( ToLower( destination ) );
         if( false == material.empty() ) {
-            m_materialdata.replacable_skins[ 4 ] = GfxRenderer.Fetch_Material( material );
+            destinationhandle = GfxRenderer.Fetch_Material( material );
             break;
         }
     }
     // whether we got anything, restore previous texture path
     Global.asCurrentTexturePath = currenttexturepath;
-};
+
+    return destinationhandle;
+}
 
 void TDynamicObject::OverheadTrack(float o)
 { // ewentualne wymuszanie jazdy
diff --git a/DynObj.h b/DynObj.h
index 6e0a5b3b..6208f77b 100644
--- a/DynObj.h
+++ b/DynObj.h
@@ -204,6 +204,20 @@ public:
     TModel3d *mdLowPolyInt; // ABu 010305: wnetrze lowpoly
     std::array<TSubModel *, 3> LowPolyIntCabs {}; // pointers to low fidelity version of individual driver cabs
     bool JointCabs{ false }; // flag for vehicles with multiple virtual 'cabs' sharing location and 3d model(s)
+    struct destination_data {
+        TSubModel *sign { nullptr }; // submodel mapped with replacable texture -4
+        bool has_light { false }; // the submodel was originally configured with self-illumination attribute
+        material_handle destination { null_handle }; // most recently assigned non-blank destination texture
+        material_handle destination_off { null_handle }; // blank destination sign
+        std::string script; // potential python script used to generate texture data
+        int update_rate { 0 }; // -1: per stop, 0: none, >0: fps // TBD, TODO: implement?
+        std::string instancing; // potential method to generate more than one texture per timetable
+        std::string parameters; // potential extra parameters supplied by mmd file
+    // methods
+        void deserialize( cParser &Input );
+    private:
+        bool deserialize_mapping( cParser &Input );
+    } DestinationSign;
     float fShade; // zacienienie: 0:normalnie, -1:w ciemności, +1:dodatkowe światło (brak koloru?)
     float LoadOffset { 0.f };
     std::unordered_map<std::string, std::string> LoadModelOverrides; // potential overrides of default load visualization models
@@ -520,6 +534,7 @@ private:
         TTrack *Track, double fDist, std::string DriverType, double fVel, std::string TrainName,
         float Load, std::string LoadType, bool Reversed, std::string);
     int init_sections( TModel3d const *Model, std::string const &Nameprefix );
+    bool init_destination( TModel3d *Model );
     void create_controller( std::string const Type, bool const Trainset );
     void AttachPrev(TDynamicObject *Object, int iType = 1);
     bool UpdateForce(double dt);
@@ -534,6 +549,7 @@ private:
     void update_load_visibility();
     void update_load_offset();
     void shuffle_load_sections();
+    void update_destinations();
     bool Update(double dt, double dt1);
     bool FastUpdate(double dt);
     void Move(double fDistance);
@@ -636,6 +652,7 @@ private:
     // zapytanie do AI, po którym segmencie skrzyżowania jechać
     int RouteWish(TTrack *tr);
     void DestinationSet(std::string to, std::string numer);
+    material_handle DestinationFind( std::string Destination );
     void OverheadTrack(float o);
 	glm::dvec3 get_future_movement() const;
 	void move_set(double distance);
diff --git a/EU07.cpp b/EU07.cpp
index 316d3772..f234d931 100644
--- a/EU07.cpp
+++ b/EU07.cpp
@@ -34,8 +34,10 @@ int main( int argc, char *argv[] )
         auto result { Application.init( argc, argv ) };
         if( result == 0 ) {
             result = Application.run();
+	    Application.exit();
         }
-        Application.exit();
+		std::_Exit(0); // skip destructors, there are ordering errors which causes segfaults
+        return result;
     }
     catch( std::bad_alloc const &Error )
 	{
diff --git a/Globals.cpp b/Globals.cpp
index 38d27f4b..b17f7444 100644
--- a/Globals.cpp
+++ b/Globals.cpp
@@ -650,6 +650,7 @@ global_settings::ConfigParse(cParser &Parser) {
 			Parser.getTokens(1);
 			Parser >> Global.screenshot_dir;
 		}
+#ifdef WITH_UART
         else if( token == "uart" ) {
             uart_conf.enable = true;
             Parser.getTokens( 3, false );
@@ -688,6 +689,7 @@ global_settings::ConfigParse(cParser &Parser) {
             Parser.getTokens( 1 );
             Parser >> uart_conf.debug;
         }
+#endif
 		else if (token == "loadinglog") {
             Parser.getTokens( 1 );
             Parser >> loading_log;
diff --git a/Globals.h b/Globals.h
index 167e5c55..d2985ca6 100644
--- a/Globals.h
+++ b/Globals.h
@@ -14,10 +14,12 @@ http://mozilla.org/MPL/2.0/.
 #include "dumb3d.h"
 #include "Float3d.h"
 #include "light.h"
-#include "uart.h"
 #include "utilities.h"
 #include "motiontelemetry.h"
 #include "version.h"
+#ifdef WITH_UART
+#include "uart.h"
+#endif
 
 struct global_settings {
 // members
@@ -169,7 +171,9 @@ struct global_settings {
         0, 0, 0, 0, 0, 0, 0 };
     int iCalibrateOutDebugInfo { -1 }; // numer wyjścia kalibrowanego dla którego wyświetlać informacje podczas kalibracji
     int iPoKeysPWM[ 7 ] = { 0, 1, 2, 3, 4, 5, 6 }; // numery wejść dla PWM
+#ifdef WITH_UART
     uart_input::conf_t uart_conf;
+#endif
     // multiplayer
     int iMultiplayer{ 0 }; // blokada działania niektórych eventów na rzecz kominikacji
     // other
diff --git a/Logs.cpp b/Logs.cpp
index 3311fa4b..a4a87e71 100644
--- a/Logs.cpp
+++ b/Logs.cpp
@@ -27,7 +27,7 @@ std::deque<std::string> log_scrollback;
 std::string filename_date() {
     ::SYSTEMTIME st;
 
-#ifdef __linux__
+#ifdef __unix__
     timespec ts;
     clock_gettime(CLOCK_REALTIME, &ts);
     tm *tms = localtime(&ts.tv_sec);
diff --git a/McZapkie/MOVER.h b/McZapkie/MOVER.h
index f76bd2da..060630d4 100644
--- a/McZapkie/MOVER.h
+++ b/McZapkie/MOVER.h
@@ -1369,6 +1369,7 @@ public:
     std::string StLinSwitchType;
 
 	bool Heating = false; //ogrzewanie 'Winger 020304
+    bool HeatingAllow { false }; // heating switch // TODO: wrap heating in a basic device
 	int DoubleTr = 1; //trakcja ukrotniona - przedni pojazd 'Winger 160304
 
 	bool PhysicActivation = true;
@@ -1514,6 +1515,7 @@ public:
 
 									  /*-funkcje typowe dla lokomotywy elektrycznej*/
 	void ConverterCheck( double const Timestep ); // przetwornica
+    void HeatingCheck( double const Timestep );
     void WaterPumpCheck( double const Timestep );
     void WaterHeaterCheck( double const Timestep );
     void FuelPumpCheck( double const Timestep );
diff --git a/McZapkie/Mover.cpp b/McZapkie/Mover.cpp
index 75f66612..3aab7fea 100644
--- a/McZapkie/Mover.cpp
+++ b/McZapkie/Mover.cpp
@@ -1186,11 +1186,13 @@ double TMoverParameters::ComputeMovement(double dt, double dt1, const TTrackShap
 
     for( int side = 0; side < 2; ++side ) {
         // przekazywanie napiec
-        auto const oppositeside = ( side == end::front ? end::rear : end::front );
+        auto const oppositeside { ( side == end::front ? end::rear : end::front ) };
+        auto const liveconnection{
+            ( Couplers[ side ].CouplingFlag & ctrain_power )
+            || ( ( Couplers[ side ].CouplingFlag & ctrain_heating )
+              && ( Couplers[ side ].Connected->Heating ) ) };
 
-        if( ( Couplers[ side ].CouplingFlag & ctrain_power )
-         || ( ( Heating )
-           && ( Couplers[ side ].CouplingFlag & ctrain_heating ) ) ) {
+        if( liveconnection ) {
             auto const &connectedcoupler = Couplers[ side ].Connected->Couplers[ Couplers[ side ].ConnectedNr ];
             Couplers[ oppositeside ].power_high.voltage =
                 std::max(
@@ -1214,8 +1216,8 @@ double TMoverParameters::ComputeMovement(double dt, double dt1, const TTrackShap
                 Couplers[ side ].power_high.local = false; // power, if any, will be from external source
 
                 if( ( Couplers[ side ].CouplingFlag & ctrain_power )
-                 || ( ( Heating )
-                   && ( Couplers[ side ].CouplingFlag & ctrain_heating ) ) ) {
+                 || ( ( Couplers[ side ].CouplingFlag & ctrain_heating )
+                   && ( Couplers[ side ].Connected->Heating ) ) ) {
                     auto const &connectedcoupler =
                         Couplers[ side ].Connected->Couplers[
                             ( Couplers[ side ].ConnectedNr == end::front ?
@@ -1238,8 +1240,8 @@ double TMoverParameters::ComputeMovement(double dt, double dt1, const TTrackShap
             Couplers[ side ].power_high.local = true; // power is coming from local pantographs
 
             if( ( Couplers[ side ].CouplingFlag & ctrain_power )
-             || ( ( Heating )
-               && ( Couplers[ side ].CouplingFlag & ctrain_heating ) ) ) {
+             || ( ( Couplers[ side ].CouplingFlag & ctrain_heating )
+               && ( Couplers[ side ].Connected->Heating ) ) ) {
                 auto const &connectedcoupler =
                     Couplers[ side ].Connected->Couplers[
                         ( Couplers[ side ].ConnectedNr == end::front ?
@@ -1520,6 +1522,8 @@ void TMoverParameters::compute_movement_( double const Deltatime ) {
         // w rozrządczym nie (jest błąd w FIZ!) - Ra 2014-07: teraz we wszystkich
         UpdatePantVolume( Deltatime ); // Ra 2014-07: obsługa zbiornika rozrządu oraz pantografów
     }
+    // heating
+    HeatingCheck( Deltatime );
 
     UpdateBrakePressure(Deltatime);
     UpdatePipePressure(Deltatime);
@@ -1573,7 +1577,8 @@ void TMoverParameters::ConverterCheck( double const Timestep ) {
     if( ( ConverterAllow )
      && ( ConverterAllowLocal )
      && ( false == PantPressLockActive )
-     && ( Mains ) ) {
+     && ( ( Mains )
+       || ( GetTrainsetVoltage() > 0 ) ) ) {
         // delay timer can be optionally configured, and is set anew whenever converter goes off
         if( ConverterStartDelayTimer <= 0.0 ) {
             ConverterFlag = true;
@@ -1588,6 +1593,17 @@ void TMoverParameters::ConverterCheck( double const Timestep ) {
     }
 };
 
+// heating system status check
+void TMoverParameters::HeatingCheck( double const Timestep ) {
+
+    Heating = (
+        ( true == HeatingAllow )
+        // powered vehicles are generally required to activate their power source to provide heating
+        // passive vehicles get a pass in this regard
+     && ( ( Power < 0.1 )
+       || ( true == Mains ) ) );
+}
+
 // water pump status check
 void TMoverParameters::WaterPumpCheck( double const Timestep ) {
     // NOTE: breaker override with start type is sm42 specific hack, replace with ability to define the presence of the breaker
@@ -7271,14 +7287,14 @@ double TMoverParameters::GetTrainsetVoltage(void)
     return std::max(
         ( ( ( Couplers[end::front].Connected )
          && ( ( Couplers[ end::front ].CouplingFlag & ctrain_power )
-           || ( ( Heating )
-             && ( Couplers[ end::front ].CouplingFlag & ctrain_heating ) ) ) ) ?
+           || ( ( Couplers[ end::front ].CouplingFlag & ctrain_heating )
+             && ( Couplers[ end::front ].Connected->Heating ) ) ) ) ?
             Couplers[end::front].Connected->Couplers[ Couplers[end::front].ConnectedNr ].power_high.voltage :
             0.0 ),
         ( ( ( Couplers[end::rear].Connected )
          && ( ( Couplers[ end::rear ].CouplingFlag & ctrain_power )
-           || ( ( Heating )
-             && ( Couplers[ end::rear ].CouplingFlag & ctrain_heating ) ) ) ) ?
+           || ( ( Couplers[ end::rear ].CouplingFlag & ctrain_heating )
+             && ( Couplers[ end::rear ].Connected->Heating ) ) ) ) ?
             Couplers[ end::rear ].Connected->Couplers[ Couplers[ end::rear ].ConnectedNr ].power_high.voltage :
             0.0 ) );
 }
diff --git a/Model3d.cpp b/Model3d.cpp
index 8521102e..08290255 100644
--- a/Model3d.cpp
+++ b/Model3d.cpp
@@ -826,6 +826,27 @@ int TSubModel::count_children() {
             1 + Child->count_siblings() );
 }
 
+// locates submodel mapped with replacable -4
+std::tuple<TSubModel *, bool>
+TSubModel::find_replacable4() {
+
+    if( m_material == -4 ) {
+        return std::make_tuple( this, ( fLight != -1.0 ) );
+    }
+
+    if( Next != nullptr ) {
+        auto lookup { Next->find_replacable4() };
+        if( std::get<TSubModel *>( lookup ) != nullptr ) { return lookup; }
+    }
+
+    if( Child != nullptr ) {
+        auto lookup { Child->find_replacable4() };
+        if( std::get<TSubModel *>( lookup ) != nullptr ) { return lookup; }
+    }
+
+    return std::make_tuple( nullptr, false );
+}
+
 uint32_t TSubModel::FlagsCheck()
 { // analiza koniecznych zmian pomiędzy submodelami
   // samo pomijanie glBindTexture() nie poprawi wydajności
diff --git a/Model3d.h b/Model3d.h
index ee248fea..132af42a 100644
--- a/Model3d.h
+++ b/Model3d.h
@@ -165,6 +165,8 @@ public:
 	TSubModel * ChildGet() { return Child; };
     int count_siblings();
     int count_children();
+    // locates submodel mapped with replacable -4
+    std::tuple<TSubModel *, bool> find_replacable4();
 	int TriangleAdd(TModel3d *m, material_handle tex, int tri);
 	void SetRotate(float3 vNewRotateAxis, float fNewAngle);
 	void SetRotateXYZ( Math3D::vector3 vNewAngles);
diff --git a/PyInt.cpp b/PyInt.cpp
index 00b743d5..6bfe0abe 100644
--- a/PyInt.cpp
+++ b/PyInt.cpp
@@ -10,10 +10,10 @@ http://mozilla.org/MPL/2.0/.
 #include "stdafx.h"
 #include "PyInt.h"
 
-#include "Globals.h"
+#include "dictionary.h"
 #include "application.h"
-#include "renderer.h"
 #include "Logs.h"
+#include "Globals.h"
 
 #ifdef __GNUC__
 #pragma GCC diagnostic ignored "-Wwrite-strings"
@@ -141,6 +141,11 @@ auto python_taskqueue::init() -> bool {
 		Py_SetPythonHome("linuxpython64");
 	else
 		Py_SetPythonHome("linuxpython");
+#elif __APPLE__
+	if (sizeof(void*) == 8)
+		Py_SetPythonHome("macpython64");
+	else
+		Py_SetPythonHome("macpython");
 #endif
     Py_Initialize();
     PyEval_InitThreads();
@@ -209,7 +214,8 @@ void python_taskqueue::exit() {
     m_condition.notify_all();
     // let them free up their shit before we proceed
     for( auto &worker : m_workers ) {
-        worker.join();
+	if (worker.joinable())
+	        worker.join();
     }
     // get rid of the leftover tasks
     // with the workers dead we don't have to worry about concurrent access anymore
diff --git a/PyInt.h b/PyInt.h
index c3b2ebb3..d3e6bc29 100644
--- a/PyInt.h
+++ b/PyInt.h
@@ -50,24 +50,6 @@ http://mozilla.org/MPL/2.0/.
 #define PyGetBool(param) param ? Py_True : Py_False
 #define PyGetString(param) PyString_FromString(param)
 
-// collection of keyword-value pairs
-// NOTE: since our python dictionary operates on a few types, most of the class was hardcoded for simplicity
-struct dictionary_source {
-// types
-    template <typename Type_>
-    using keyvaluepair_sequence = std::vector<std::pair<std::string, Type_>>;
-// members
-    keyvaluepair_sequence<double> floats;
-    keyvaluepair_sequence<int> integers;
-    keyvaluepair_sequence<bool> bools;
-    keyvaluepair_sequence<std::string> strings;
-// methods
-    inline void insert( std::string const &Key, double const Value )      { floats.emplace_back( Key, Value ); }
-    inline void insert( std::string const &Key, int const Value )         { integers.emplace_back( Key, Value ); }
-    inline void insert( std::string const &Key, bool const Value )        { bools.emplace_back( Key, Value ); }
-    inline void insert( std::string const &Key, std::string const Value ) { strings.emplace_back( Key, Value ); }
-};
-
 // python rendertarget
 struct python_rt {
 	std::mutex mutex;
diff --git a/Texture.cpp b/Texture.cpp
index 9dd56b3f..254eb2c4 100644
--- a/Texture.cpp
+++ b/Texture.cpp
@@ -17,14 +17,16 @@ http://mozilla.org/MPL/2.0/.
 #include "Texture.h"
 
 #include "application.h"
-#include "utilities.h"
+#include "dictionary.h"
 #include "Globals.h"
 #include "Logs.h"
+#include "utilities.h"
 #include "sn_utils.h"
 #include "utilities.h"
 #include "flip-s3tc.h"
 #include <png.h>
 
+
 #define EU07_DEFERRED_TEXTURE_UPLOAD
 
 texture_manager::texture_manager() {
@@ -266,17 +268,9 @@ void
 opengl_texture::make_request() {
 
     auto const components { Split( name, '?' ) };
-    auto const query { Split( components.back(), '&' ) };
 
-    auto *dictionary { new dictionary_source };
-    if( dictionary != nullptr ) {
-        for( auto const &querypair : query ) {
-            auto const valuepos { querypair.find( '=' ) };
-            dictionary->insert(
-                ToLower( querypair.substr( 0, valuepos ) ),
-                querypair.substr( valuepos + 1 ) );
-        }
-    }
+    auto *dictionary { new dictionary_source( components.back() ) };
+    if( dictionary == nullptr ) { return; }
 
 	auto rt = std::make_shared<python_rt>();
 	rt->shared_tex = id;
diff --git a/Timer.cpp b/Timer.cpp
index 278a879a..02fc558e 100644
--- a/Timer.cpp
+++ b/Timer.cpp
@@ -61,7 +61,7 @@ void UpdateTimers(bool pause)
 #ifdef _WIN32
     QueryPerformanceFrequency((LARGE_INTEGER *)&fr);
     QueryPerformanceCounter((LARGE_INTEGER *)&count);
-#elif __linux__
+#elif __unix__
 	timespec ts;
 	clock_gettime(CLOCK_MONOTONIC, &ts);
 	count = (uint64_t)ts.tv_sec * 1000000000 + (uint64_t)ts.tv_nsec;
@@ -85,7 +85,7 @@ void UpdateTimers(bool pause)
 
     oldCount = count;
     // Keep track of the time lapse and frame count
-#if __linux__
+#if __unix__
 	double fTime = (double)(count / 1000000000);
 #elif _WIN32_WINNT >= _WIN32_WINNT_VISTA
     double fTime = ::GetTickCount64() * 0.001f; // Get current time in seconds
diff --git a/Train.cpp b/Train.cpp
index bd82a6f3..2fe17ef3 100644
--- a/Train.cpp
+++ b/Train.cpp
@@ -30,6 +30,7 @@ http://mozilla.org/MPL/2.0/.
 #include "Console.h"
 #include "application.h"
 #include "renderer.h"
+#include "dictionary.h"
 /*
 namespace input {
 
@@ -552,31 +553,8 @@ dictionary_source *TTrain::GetTrainState() {
     dict->insert( "velnext", driver->VelNext );
     dict->insert( "actualproximitydist", driver->ActualProximityDist );
     // train data
-    auto const *timetable{ driver->TrainTimetable() };
-
-    dict->insert( "trainnumber", driver->TrainName() );
-    dict->insert( "train_brakingmassratio", timetable->BrakeRatio );
-    dict->insert( "train_enginetype", timetable->LocSeries );
-    dict->insert( "train_engineload", timetable->LocLoad );
-
-    dict->insert( "train_stationindex", driver->iStationStart );
-    auto const stationcount { driver->StationCount() };
-    dict->insert( "train_stationcount", stationcount );
-    if( stationcount > 0 ) {
-        // timetable stations data, if there's any
-        for( auto stationidx = 1; stationidx <= stationcount; ++stationidx ) {
-            auto const stationlabel { "train_station" + std::to_string( stationidx ) + "_" };
-            auto const &timetableline { timetable->TimeTable[ stationidx ] };
-            dict->insert( ( stationlabel + "name" ), Bezogonkow( timetableline.StationName ) );
-            dict->insert( ( stationlabel + "fclt" ), Bezogonkow( timetableline.StationWare ) );
-            dict->insert( ( stationlabel + "lctn" ), timetableline.km );
-            dict->insert( ( stationlabel + "vmax" ), timetableline.vmax );
-            dict->insert( ( stationlabel + "ah" ), timetableline.Ah );
-            dict->insert( ( stationlabel + "am" ), timetableline.Am );
-            dict->insert( ( stationlabel + "dh" ), timetableline.Dh );
-            dict->insert( ( stationlabel + "dm" ), timetableline.Dm );
-        }
-    }
+    driver->TrainTimetable()->serialize( dict );
+    dict->insert( "train_stationstart", driver->iStationStart );
     dict->insert( "train_atpassengerstop", driver->IsAtPassengerStop );
     // world state data
     dict->insert( "scenario", Global.SceneryFile );
@@ -4148,7 +4126,7 @@ void TTrain::OnCommand_heatingtoggle( TTrain *Train, command_data const &Command
 
     if( Command.action == GLFW_PRESS ) {
         // only reacting to press, so the switch doesn't flip back and forth if key is held down
-        if( false == Train->mvControlled->Heating ) {
+        if( false == Train->mvControlled->HeatingAllow ) {
             // turn on
             OnCommand_heatingenable( Train, Command );
         }
@@ -4162,24 +4140,20 @@ void TTrain::OnCommand_heatingtoggle( TTrain *Train, command_data const &Command
 void TTrain::OnCommand_heatingenable( TTrain *Train, command_data const &Command ) {
 
     if( Command.action == GLFW_PRESS ) {
+
+        Train->mvControlled->HeatingAllow = true;
         // visual feedback
         Train->ggTrainHeatingButton.UpdateValue( 1.0, Train->dsbSwitch );
-
-        if( true == Train->mvControlled->Heating ) { return; } // already enabled
-
-        Train->mvControlled->Heating = true;
     }
 }
 
 void TTrain::OnCommand_heatingdisable( TTrain *Train, command_data const &Command ) {
 
     if( Command.action == GLFW_PRESS ) {
+
+        Train->mvControlled->HeatingAllow = false;
         // visual feedback
         Train->ggTrainHeatingButton.UpdateValue( 0.0, Train->dsbSwitch );
-
-        if( false == Train->mvControlled->Heating ) { return; } // already disabled
-
-        Train->mvControlled->Heating = false;
     }
 }
 
@@ -6028,7 +6002,6 @@ bool TTrain::Update( double const Deltatime )
         //---------
         // hunter-080812: poprawka na ogrzewanie w elektrykach - usuniete uzaleznienie od przetwornicy
         if( ( mvControlled->Heating == true )
-         && ( mvControlled->Mains == true )
          && ( mvControlled->ConvOvldFlag == false ) )
             btLampkaOgrzewanieSkladu.Turn( true );
         else
diff --git a/TrkFoll.cpp b/TrkFoll.cpp
index ece011e5..20a5d677 100644
--- a/TrkFoll.cpp
+++ b/TrkFoll.cpp
@@ -31,8 +31,6 @@ bool TTrackFollower::Init(TTrack *pTrack, TDynamicObject *NewOwner, double fDir)
     fDirection = fDir;
     Owner = NewOwner;
     SetCurrentTrack(pTrack, 0);
-	fCurrentDistance = 0.0;
-	fDirection = 1.0;
     iEventFlag = 3; // na torze startowym również wykonać eventy 1/2
     iEventallFlag = 3;
     if ((pCurrentSegment)) // && (pCurrentSegment->GetLength()<fFirstDistance))
@@ -40,6 +38,12 @@ bool TTrackFollower::Init(TTrack *pTrack, TDynamicObject *NewOwner, double fDir)
     return true;
 }
 
+void TTrackFollower::Reset()
+{
+	fCurrentDistance = 0.0;
+	fDirection = 1.0;
+}
+
 TTrack * TTrackFollower::SetCurrentTrack(TTrack *pTrack, int end)
 { // przejechanie na inny odcinkek toru, z ewentualnym rozpruciem
     if (pTrack)
diff --git a/TrkFoll.h b/TrkFoll.h
index 05fb1b94..c2a118f5 100644
--- a/TrkFoll.h
+++ b/TrkFoll.h
@@ -40,6 +40,7 @@ public:
     //{ return pCurrentSegment->ComputeLength(p1,cp1,cp2,p2); };
     // inline double GetRadius(double L, double d);  //McZapkie-150503
     bool Init(TTrack *pTrack, TDynamicObject *NewOwner, double fDir);
+	void Reset();
     void Render(float fNr);
 // members
     double fOffsetH = 0.0; // Ra: odległość środka osi od osi toru (dla samochodów) - użyć do wężykowania
diff --git a/application.cpp b/application.cpp
index 4a5437e8..052dd663 100644
--- a/application.cpp
+++ b/application.cpp
@@ -24,6 +24,7 @@ http://mozilla.org/MPL/2.0/.
 #include "translation.h"
 #include "Train.h"
 #include "Timer.h"
+#include "dictionary.h"
 
 #pragma comment (lib, "glu32.lib")
 #pragma comment (lib, "dsound.lib")
@@ -32,7 +33,7 @@ http://mozilla.org/MPL/2.0/.
 #pragma comment (lib, "dbghelp.lib")
 #pragma comment (lib, "version.lib")
 
-#ifdef __linux__
+#ifdef __unix__
 #include <unistd.h>
 #include <sys/stat.h>
 #endif
@@ -560,7 +561,7 @@ eu07_application::init_files() {
     DeleteFile( "log.txt" );
     DeleteFile( "errors.txt" );
     CreateDirectory( "logs", NULL );
-#elif __linux__
+#elif __unix__
 	unlink("log.txt");
 	unlink("errors.txt");
 	mkdir("logs", 0755);
diff --git a/audio.h b/audio.h
index f8c2fe9c..d84d54a1 100644
--- a/audio.h
+++ b/audio.h
@@ -9,8 +9,13 @@ http://mozilla.org/MPL/2.0/.
 
 #pragma once
 
+#ifdef __APPLE__
+#include <OpenAL/al.h>
+#include <OpenAL/alc.h>
+#else
 #include <AL/al.h>
 #include <AL/alc.h>
+#endif
 
 namespace audio {
 
diff --git a/azure-pipelines.yml b/azure-pipelines.yml
index c4c624ec..50ec575f 100644
--- a/azure-pipelines.yml
+++ b/azure-pipelines.yml
@@ -26,6 +26,26 @@ jobs:
         artifactName: binaries
       displayName: 'Publish binaries'
 
+  - job: macos1013
+    pool:
+      vmImage: 'macOS-10.13'
+    displayName: 'MacOS 10.13'
+    steps:
+    - script: |
+        HOMEBREW_NO_AUTO_UPDATE=1 brew install glew glfw python2 libpng glm luajit libserialport libsndfile asio pkg-config
+      displayName: 'Install dependencies'
+    - script: |
+        mkdir build
+        cd build
+        cmake .. -DCMAKE_BUILD_TYPE=Release -DWITH_UART=OFF
+        cmake --build .
+      displayName: 'Build'
+    - task: PublishBuildArtifacts@1
+      inputs:
+        pathtoPublish: 'build/bin'
+        artifactName: binaries
+      displayName: 'Publish binaries'
+
   - job: windows_x64
     pool:
       vmImage: 'vs2017-win2016'
diff --git a/dictionary.cpp b/dictionary.cpp
new file mode 100644
index 00000000..f4e987ec
--- /dev/null
+++ b/dictionary.cpp
@@ -0,0 +1,55 @@
+/*
+This Source Code Form is subject to the
+terms of the Mozilla Public License, v.
+2.0. If a copy of the MPL was not
+distributed with this file, You can
+obtain one at
+http://mozilla.org/MPL/2.0/.
+*/
+
+#include "stdafx.h"
+#include "dictionary.h"
+
+#include "simulation.h"
+#include "utilities.h"
+#include "DynObj.h"
+#include "Driver.h"
+#include "mtable.h"
+
+dictionary_source::dictionary_source( std::string const &Input ) {
+
+    auto const keyvaluepairs { Split( Input, '&' ) };
+
+    for( auto const &keyvaluepair : keyvaluepairs ) {
+
+        auto const valuepos { keyvaluepair.find( '=' ) };
+        if( keyvaluepair[ 0 ] != '$' ) {
+            // regular key, value pairs
+            insert(
+                ToLower( keyvaluepair.substr( 0, valuepos ) ),
+                keyvaluepair.substr( valuepos + 1 ) );
+        }
+        else {
+            // special case, $key indicates request to include certain dataset clarified by value
+            auto const key { ToLower( keyvaluepair.substr( 0, valuepos ) ) };
+            auto const value { keyvaluepair.substr( valuepos + 1 ) };
+
+            if( key == "$timetable" ) {
+                // timetable pulled from (preferably) the owner/direct controller of specified vehicle
+                auto const *vehicle { simulation::Vehicles.find( value ) };
+                auto const *controller { (
+                    vehicle == nullptr ? nullptr :
+                    vehicle->ctOwner == nullptr ? vehicle->Mechanik :
+                    vehicle->ctOwner ) };
+                auto const *timetable { (
+                    controller != nullptr ?
+                        controller->TrainTimetable() :
+                        nullptr ) };
+
+                if( timetable != nullptr ) {
+                    timetable->serialize( this );
+                }
+            }
+        }
+    }
+}
diff --git a/dictionary.h b/dictionary.h
new file mode 100644
index 00000000..98828856
--- /dev/null
+++ b/dictionary.h
@@ -0,0 +1,31 @@
+/*
+This Source Code Form is subject to the
+terms of the Mozilla Public License, v.
+2.0. If a copy of the MPL was not
+distributed with this file, You can
+obtain one at
+http://mozilla.org/MPL/2.0/.
+*/
+
+#pragma once
+
+// collection of keyword-value pairs
+// NOTE: since our python dictionary operates on a few types, most of the class was hardcoded for simplicity
+struct dictionary_source {
+// types
+    template <typename Type_>
+    using keyvaluepair_sequence = std::vector<std::pair<std::string, Type_>>;
+// members
+    keyvaluepair_sequence<double> floats;
+    keyvaluepair_sequence<int> integers;
+    keyvaluepair_sequence<bool> bools;
+    keyvaluepair_sequence<std::string> strings;
+// constructors
+    dictionary_source() = default;
+    dictionary_source( std::string const &Input );
+// methods
+    inline void insert( std::string const &Key, double const Value )      { floats.emplace_back( Key, Value ); }
+    inline void insert( std::string const &Key, int const Value )         { integers.emplace_back( Key, Value ); }
+    inline void insert( std::string const &Key, bool const Value )        { bools.emplace_back( Key, Value ); }
+    inline void insert( std::string const &Key, std::string const Value ) { strings.emplace_back( Key, Value ); }
+};
diff --git a/drivermode.cpp b/drivermode.cpp
index 47017431..02ad84f3 100644
--- a/drivermode.cpp
+++ b/drivermode.cpp
@@ -45,9 +45,11 @@ driver_mode::drivermode_input::poll() {
     if( true == Global.InputGamepad ) {
         gamepad.poll();
     }
+#ifdef WITH_UART
     if( uart != nullptr ) {
         uart->poll();
     }
+#endif
 /*
     // TBD, TODO: wrap current command in object, include other input sources?
     input::command = (
@@ -67,10 +69,12 @@ driver_mode::drivermode_input::init() {
     if( true == Global.InputGamepad ) {
         gamepad.init();
     }
+#ifdef WITH_UART
     if( true == Global.uart_conf.enable ) {
         uart = std::make_unique<uart_input>();
         uart->init();
     }
+#endif
     if (Global.motiontelemetry_conf.enable)
         telemetry = std::make_unique<motiontelemetry>();
 
diff --git a/drivermode.h b/drivermode.h
index ec1756e6..86044961 100644
--- a/drivermode.h
+++ b/drivermode.h
@@ -14,10 +14,12 @@ http://mozilla.org/MPL/2.0/.
 #include "driverkeyboardinput.h"
 #include "drivermouseinput.h"
 #include "gamepadinput.h"
-#include "uart.h"
 #include "Console.h"
 #include "Camera.h"
 #include "Classes.h"
+#ifdef WITH_UART
+#include "uart.h"
+#endif
 
 class driver_mode : public application_mode {
 
@@ -77,7 +79,9 @@ private:
 #ifdef _WIN32
         Console console;
 #endif
+#ifdef WITH_UART
         std::unique_ptr<uart_input> uart;
+#endif
         std::unique_ptr<motiontelemetry> telemetry;
 
         bool init();
diff --git a/mtable.cpp b/mtable.cpp
index c1608f82..db6a0c35 100644
--- a/mtable.cpp
+++ b/mtable.cpp
@@ -11,6 +11,7 @@ http://mozilla.org/MPL/2.0/.
 #include "mtable.h"
 #include "Globals.h"
 #include "simulationtime.h"
+#include "dictionary.h"
 #include "utilities.h"
 
 double TTrainParameters::CheckTrainLatency()
@@ -524,3 +525,29 @@ bool TTrainParameters::DirectionChange()
             return true;
     return false;
 }
+
+void TTrainParameters::serialize( dictionary_source *Output ) const {
+
+    Output->insert( "trainnumber", TrainName );
+    Output->insert( "train_brakingmassratio", BrakeRatio );
+    Output->insert( "train_enginetype", LocSeries );
+    Output->insert( "train_engineload", LocLoad );
+
+    Output->insert( "train_stationindex", StationIndex );
+    Output->insert( "train_stationcount", StationCount );
+    if( StationCount > 0 ) {
+        // timetable stations data, if there's any
+        for( auto stationidx = 1; stationidx <= StationCount; ++stationidx ) {
+            auto const stationlabel { "train_station" + std::to_string( stationidx ) + "_" };
+            auto const &timetableline { TimeTable[ stationidx ] };
+            Output->insert( ( stationlabel + "name" ), Bezogonkow( timetableline.StationName ) );
+            Output->insert( ( stationlabel + "fclt" ), Bezogonkow( timetableline.StationWare ) );
+            Output->insert( ( stationlabel + "lctn" ), timetableline.km );
+            Output->insert( ( stationlabel + "vmax" ), timetableline.vmax );
+            Output->insert( ( stationlabel + "ah" ), timetableline.Ah );
+            Output->insert( ( stationlabel + "am" ), timetableline.Am );
+            Output->insert( ( stationlabel + "dh" ), timetableline.Dh );
+            Output->insert( ( stationlabel + "dm" ), timetableline.Dm );
+        }
+    }
+}
diff --git a/mtable.h b/mtable.h
index ea905e4c..78816aaa 100644
--- a/mtable.h
+++ b/mtable.h
@@ -83,6 +83,7 @@ class TTrainParameters
     bool LoadTTfile(std::string scnpath, int iPlus, double vmax);
     bool DirectionChange();
     void StationIndexInc();
+    void serialize( dictionary_source *Output ) const;
 };
 
 class TMTableTime
diff --git a/screenshot.cpp b/screenshot.cpp
index 33b4bad9..765f37f7 100644
--- a/screenshot.cpp
+++ b/screenshot.cpp
@@ -38,7 +38,7 @@ void screenshot_manager::screenshot_save_thread( char *img, int w, int h )
 	uint64_t perf;
 #ifdef _WIN32
 	QueryPerformanceCounter((LARGE_INTEGER*)&perf);
-#elif __linux__
+#elif __unix__
 	timespec ts;
 	clock_gettime(CLOCK_REALTIME, &ts);
 	perf = ts.tv_nsec;
diff --git a/stdafx.h b/stdafx.h
index 90301cc2..98fef00a 100644
--- a/stdafx.h
+++ b/stdafx.h
@@ -6,6 +6,12 @@
 #ifndef STDAFX_H
 #define STDAFX_H
 
+#ifdef __APPLE__
+#ifndef __unix__
+#define __unix__ 1
+#endif
+#endif
+
 #define _USE_MATH_DEFINES
 #include <cmath>
 #ifdef _MSC_VER
@@ -29,7 +35,7 @@
 #include <shlobj.h>
 #undef NOMINMAX
 #endif
-#ifdef __linux__
+#ifdef __unix__
 #include <sys/stat.h>
 #endif
 // stl
@@ -71,18 +77,9 @@
 #include <chrono>
 #include <optional>
 
-#ifdef EU07_BUILD_STATIC
-#define GLEW_STATIC
-#else
-#ifdef _WIN32
-#define GLFW_DLL
-#endif // _windows
-#endif // build_static
-
 #include "glad/glad.h"
 
 #define GLFW_INCLUDE_NONE
-//#define GLFW_INCLUDE_GLU
 #include <GLFW/glfw3.h>
 
 #ifndef GLFW_TRUE
diff --git a/version.h b/version.h
index 82a85aa3..492e4478 100644
--- a/version.h
+++ b/version.h
@@ -1 +1 @@
-#define VERSION_INFO "M7 (GL3 NET) 02.04.2019"
+#define VERSION_INFO "M7 (GL3 NET) 15.04.2019"
diff --git a/widgets/popup.h b/widgets/popup.h
index 27d2d047..da0d3b8f 100644
--- a/widgets/popup.h
+++ b/widgets/popup.h
@@ -12,7 +12,7 @@ class popup
 
   public:
 	popup(ui_panel &panel);
-	~popup();
+	virtual ~popup();
 
 	bool render();