--- a/src/ai/default/default.cpp	Thu Feb 14 15:13:36 2008 +0000
+++ b/src/ai/default/default.cpp	Thu Feb 14 15:59:16 2008 +0000
@@ -2639,8 +2639,7 @@
 		_cleared_town = NULL;
 
 		if (p->mode == 2) {
-			if (IsTileType(c, MP_ROAD) &&
-					GetRoadTileType(c) == ROAD_TILE_NORMAL &&
+			if (IsNormalRoadTile(c) &&
 					(GetRoadBits(c, ROADTYPE_ROAD) & p->attr) != 0) {
 				roadflag |= 2;
 
@@ -2682,7 +2681,7 @@
 
 			if (GetTileSlope(c, NULL) != SLOPE_FLAT) return CMD_ERROR;
 
-			if (!IsTileType(c, MP_ROAD) || GetRoadTileType(c) != ROAD_TILE_NORMAL) {
+			if (!IsNormalRoadTile(c)) {
 				ret = DoCommand(c, 0, 0, flag | DC_AUTO | DC_NO_WATER | DC_AI_BUILDING, CMD_LANDSCAPE_CLEAR);
 				if (CmdFailed(ret)) return CMD_ERROR;
 			}
@@ -2857,7 +2856,7 @@
 	if (dist <= a->best_dist) {
 		TileIndex tile2 = TILE_MASK(tile + TileOffsByDiagDir(_dir_by_track[track]));
 
-		if (IsTileType(tile2, MP_ROAD) && GetRoadTileType(tile2) == ROAD_TILE_NORMAL) {
+		if (IsNormalRoadTile(tile2)) {
 			a->best_dist = dist;
 			a->best_tile = tile;
 			a->best_track = track;
@@ -3740,7 +3739,7 @@
 
 		if (IsLevelCrossing(tile)) goto is_rail_crossing;
 
-		if (GetRoadTileType(tile) == ROAD_TILE_DEPOT) {
+		if (IsRoadDepot(tile)) {
 			DiagDirection dir;
 			TileIndex t;
 

--- a/src/ai/trolly/trolly.cpp	Thu Feb 14 15:13:36 2008 +0000
+++ b/src/ai/trolly/trolly.cpp	Thu Feb 14 15:59:16 2008 +0000
@@ -801,8 +801,7 @@
 		for (j = DIAGDIR_BEGIN; j < DIAGDIR_END; j++) {
 			TileIndex t = tile + TileOffsByDiagDir(j);
 
-			if (IsTileType(t, MP_ROAD) &&
-					GetRoadTileType(t) == ROAD_TILE_DEPOT &&
+			if (IsRoadDepotTile(t) &&
 					IsTileOwner(t, _current_player) &&
 					GetRoadDepotDirection(t) == ReverseDiagDir(j)) {
 				_players_ainew[p->index].depot_tile = t;
@@ -1102,7 +1101,7 @@
 	CommandCost res;
 	assert(_players_ainew[p->index].state == AI_STATE_BUILD_DEPOT);
 
-	if (IsTileType(_players_ainew[p->index].depot_tile, MP_ROAD) && GetRoadTileType(_players_ainew[p->index].depot_tile) == ROAD_TILE_DEPOT) {
+	if (IsRoadDepotTile(_players_ainew[p->index].depot_tile)) {
 		if (IsTileOwner(_players_ainew[p->index].depot_tile, _current_player)) {
 			// The depot is already built
 			_players_ainew[p->index].state = AI_STATE_BUILD_VEHICLE;

--- a/src/depot.h	Thu Feb 14 15:13:36 2008 +0000
+++ b/src/depot.h	Thu Feb 14 15:59:16 2008 +0000
@@ -45,7 +45,7 @@
 			return IsTileType(tile, MP_RAILWAY) && GetRailTileType(tile)  == RAIL_TILE_DEPOT;
 
 		case TRANSPORT_ROAD:
-			return IsTileType(tile, MP_ROAD)    && GetRoadTileType(tile)  == ROAD_TILE_DEPOT;
+			return IsRoadDepotTile(tile);
 
 		case TRANSPORT_WATER:
 			return IsTileType(tile, MP_WATER)   && GetWaterTileType(tile) == WATER_TILE_DEPOT;
@@ -64,7 +64,7 @@
 static inline bool IsDepotTile(TileIndex tile)
 {
 	switch (GetTileType(tile)) {
-		case MP_ROAD:    return GetRoadTileType(tile)  == ROAD_TILE_DEPOT;
+		case MP_ROAD:    return IsRoadDepot(tile);
 		case MP_WATER:   return GetWaterTileType(tile) == WATER_TILE_DEPOT;
 		case MP_RAILWAY: return GetRailTileType(tile)  == RAIL_TILE_DEPOT;
 		case MP_STATION: return IsHangar(tile);

--- a/src/elrail.cpp	Thu Feb 14 15:13:36 2008 +0000
+++ b/src/elrail.cpp	Thu Feb 14 15:59:16 2008 +0000
@@ -103,7 +103,7 @@
 			return AxisToTrackBits(DiagDirToAxis(GetTunnelBridgeDirection(t)));
 
 		case MP_ROAD:
-			if (GetRoadTileType(t) != ROAD_TILE_CROSSING) return TRACK_BIT_NONE;
+			if (!IsLevelCrossing(t)) return TRACK_BIT_NONE;
 			if (GetRailType(t) != RAILTYPE_ELECTRIC) return TRACK_BIT_NONE;
 			return GetCrossingRailBits(t);
 

--- a/src/npf.cpp	Thu Feb 14 15:13:36 2008 +0000
+++ b/src/npf.cpp	Thu Feb 14 15:59:16 2008 +0000
@@ -512,7 +512,7 @@
 /** Tests if a tile is a road tile with a single tramtrack (tram can reverse) */
 static DiagDirection GetSingleTramBit(TileIndex tile)
 {
-	if (IsTileType(tile, MP_ROAD) && GetRoadTileType(tile) == ROAD_TILE_NORMAL) {
+	if (IsNormalRoadTile(tile)) {
 		RoadBits rb = GetRoadBits(tile, ROADTYPE_TRAM);
 		switch (rb) {
 			case ROAD_NW: return DIAGDIR_NW;

--- a/src/openttd.cpp	Thu Feb 14 15:13:36 2008 +0000
+++ b/src/openttd.cpp	Thu Feb 14 15:59:16 2008 +0000
@@ -2388,7 +2388,7 @@
 					Owner o = GetRoadOwner(t, rt);
 					if (IsValidPlayer(o) && !GetPlayer(o)->is_active) SetRoadOwner(t, rt, OWNER_NONE);
 				}
-				if (GetRoadTileType(t) == ROAD_TILE_CROSSING) {
+				if (IsLevelCrossing(t)) {
 					Owner o = GetTileOwner(t);
 					if (!GetPlayer(o)->is_active) {
 						/* remove leftover rail piece from crossing (from very old savegames) */

--- a/src/order_gui.cpp	Thu Feb 14 15:13:36 2008 +0000
+++ b/src/order_gui.cpp	Thu Feb 14 15:59:16 2008 +0000
@@ -281,7 +281,7 @@
 			break;
 
 		case MP_ROAD:
-			if (GetRoadTileType(tile) == ROAD_TILE_DEPOT && v->type == VEH_ROAD && IsTileOwner(tile, _local_player)) {
+			if (IsRoadDepot(tile) && v->type == VEH_ROAD && IsTileOwner(tile, _local_player)) {
 				order.type = OT_GOTO_DEPOT;
 				order.flags = OFB_PART_OF_ORDERS;
 				order.dest = GetDepotByTile(tile)->index;

--- a/src/rail_cmd.cpp	Thu Feb 14 15:13:36 2008 +0000
+++ b/src/rail_cmd.cpp	Thu Feb 14 15:59:16 2008 +0000
@@ -356,7 +356,7 @@
 
 			if (!EnsureNoVehicleOnGround(tile)) return CMD_ERROR;
 
-			if (GetRoadTileType(tile) == ROAD_TILE_NORMAL) {
+			if (IsNormalRoad(tile)) {
 				if (HasRoadWorks(tile)) return_cmd_error(STR_ROAD_WORKS_IN_PROGRESS);
 
 				RoadTypes roadtypes = GetRoadTypes(tile);

--- a/src/road_cmd.cpp	Thu Feb 14 15:13:36 2008 +0000
+++ b/src/road_cmd.cpp	Thu Feb 14 15:59:16 2008 +0000
@@ -225,7 +225,7 @@
 
 			/* Don't allow road to be removed from the crossing when there is tram;
 			 * we can't draw the crossing without trambits ;) */
-			if (rt == ROADTYPE_ROAD && HasBit(GetRoadTypes(tile), ROADTYPE_TRAM) && (flags & DC_EXEC || crossing_check)) return CMD_ERROR;
+			if (rt == ROADTYPE_ROAD && HasTileRoadType(tile, ROADTYPE_TRAM) && (flags & DC_EXEC || crossing_check)) return CMD_ERROR;
 
 			if (rt == ROADTYPE_ROAD) {
 				ChangeTownRating(t, -road_remove_cost[(byte)edge_road], RATING_ROAD_MINIMUM);
@@ -429,7 +429,7 @@
 					if (!EnsureNoVehicleOnGround(tile)) return CMD_ERROR;
 
 					all_bits = GetAllRoadBits(tile);
-					if (!HasBit(GetRoadTypes(tile), rt)) break;
+					if (!HasTileRoadType(tile, rt)) break;
 
 					existing = GetRoadBits(tile, rt);
 					RoadBits merged = existing | pieces;
@@ -455,7 +455,7 @@
 				} break;
 
 				case ROAD_TILE_CROSSING:
-					if (HasBit(GetRoadTypes(tile), rt)) return_cmd_error(STR_1007_ALREADY_BUILT);
+					if (HasTileRoadType(tile, rt)) return_cmd_error(STR_1007_ALREADY_BUILT);
 					all_bits = GetCrossingRoadBits(tile);
 					if (pieces & ComplementRoadBits(all_bits)) goto do_clear;
 					if (!EnsureNoVehicleOnGround(tile)) return CMD_ERROR;
@@ -508,14 +508,14 @@
 
 		case MP_STATION:
 			if (!IsDriveThroughStopTile(tile)) return CMD_ERROR;
-			if (HasBit(GetRoadTypes(tile), rt)) return_cmd_error(STR_1007_ALREADY_BUILT);
+			if (HasTileRoadType(tile, rt)) return_cmd_error(STR_1007_ALREADY_BUILT);
 			/* Don't allow adding roadtype to the roadstop when vehicles are already driving on it */
 			if (!EnsureNoVehicleOnGround(tile)) return CMD_ERROR;
 			break;
 
 		case MP_TUNNELBRIDGE:
 			if (GetTunnelBridgeTransportType(tile) != TRANSPORT_ROAD) return CMD_ERROR;
-			if (HasBit(GetRoadTypes(tile), rt)) return_cmd_error(STR_1007_ALREADY_BUILT);
+			if (HasTileRoadType(tile, rt)) return_cmd_error(STR_1007_ALREADY_BUILT);
 			/* Don't allow adding roadtype to the bridge/tunnel when vehicles are already driving on it */
 			if (GetVehicleTunnelBridge(tile, GetOtherTunnelBridgeEnd(tile)) != NULL) return CMD_ERROR;
 			break;
@@ -543,7 +543,7 @@
 		pieces &= ComplementRoadBits(existing);
 
 		/* Check if new road bits will have the same foundation as other existing road types */
-		if (GetRoadTileType(tile) == ROAD_TILE_NORMAL) {
+		if (IsNormalRoad(tile)) {
 			Slope slope = GetTileSlope(tile, NULL);
 			Foundation found_new = GetRoadFoundation(slope, pieces | existing);
 
@@ -603,7 +603,7 @@
 				break;
 		}
 
-		if (rt != ROADTYPE_TRAM && IsTileType(tile, MP_ROAD) && GetRoadTileType(tile) == ROAD_TILE_NORMAL) {
+		if (rt != ROADTYPE_TRAM && IsNormalRoadTile(tile)) {
 			existing |= pieces;
 			SetDisallowedRoadDirections(tile, (existing == ROAD_X || existing == ROAD_Y) ?
 					GetDisallowedRoadDirections(tile) ^ toggle_drd : DRD_NONE);
@@ -1090,7 +1090,7 @@
 			}
 
 			DrawGroundSprite(image, pal);
-			if (HasBit(GetRoadTypes(ti->tile), ROADTYPE_TRAM)) {
+			if (HasTileRoadType(ti->tile, ROADTYPE_TRAM)) {
 				DrawGroundSprite(SPR_TRAMWAY_OVERLAY + (GetCrossingRoadAxis(ti->tile) ^ 1), pal);
 				DrawTramCatenary(ti, GetCrossingRoadBits(ti->tile));
 			}
@@ -1108,7 +1108,7 @@
 
 			palette = PLAYER_SPRITE_COLOR(GetTileOwner(ti->tile));
 
-			if (HasBit(GetRoadTypes(ti->tile), ROADTYPE_TRAM)) {
+			if (HasTileRoadType(ti->tile, ROADTYPE_TRAM)) {
 				dts =  &_tram_depot[GetRoadDepotDirection(ti->tile)];
 			} else {
 				dts =  &_road_depot[GetRoadDepotDirection(ti->tile)];
@@ -1165,7 +1165,7 @@
 	Slope tileh = GetTileSlope(tile, &z);
 
 	if (tileh == SLOPE_FLAT) return z;
-	if (GetRoadTileType(tile) == ROAD_TILE_NORMAL) {
+	if (IsNormalRoad(tile)) {
 		Foundation f = GetRoadFoundation(tileh, GetAllRoadBits(tile));
 		z += ApplyFoundationToSlope(f, &tileh);
 		return z + GetPartialZ(x & 0xF, y & 0xF, tileh);
@@ -1176,7 +1176,7 @@
 
 static Foundation GetFoundation_Road(TileIndex tile, Slope tileh)
 {
-	if (GetRoadTileType(tile) == ROAD_TILE_NORMAL) {
+	if (IsNormalRoad(tile)) {
 		return GetRoadFoundation(tileh, GetAllRoadBits(tile));
 	} else {
 		return FlatteningFoundation(tileh);
@@ -1229,7 +1229,7 @@
 			break;
 	}
 
-	if (GetRoadTileType(tile) == ROAD_TILE_DEPOT) return;
+	if (IsRoadDepot(tile)) return;
 
 	const Town* t = ClosestTownFromTile(tile, (uint)-1);
 	if (!HasRoadWorks(tile)) {
@@ -1241,7 +1241,7 @@
 			/* Show an animation to indicate road work */
 			if (t->road_build_months != 0 &&
 					(DistanceManhattan(t->xy, tile) < 8 || grp != HZB_TOWN_EDGE) &&
-					GetRoadTileType(tile) == ROAD_TILE_NORMAL && CountBits(GetAllRoadBits(tile)) > 1 ) {
+					IsNormalRoad(tile) && CountBits(GetAllRoadBits(tile)) > 1 ) {
 				if (GetTileSlope(tile, NULL) == SLOPE_FLAT && EnsureNoVehicleOnGround(tile) && Chance16(1, 40)) {
 					StartRoadWorks(tile);
 
@@ -1297,7 +1297,7 @@
 
 static void ClickTile_Road(TileIndex tile)
 {
-	if (GetRoadTileType(tile) == ROAD_TILE_DEPOT) ShowDepotWindow(tile, VEH_ROAD);
+	if (IsRoadDepot(tile)) ShowDepotWindow(tile, VEH_ROAD);
 }
 
 static const byte _road_trackbits[16] = {
@@ -1402,7 +1402,7 @@
 
 static void ChangeTileOwner_Road(TileIndex tile, PlayerID old_player, PlayerID new_player)
 {
-	if (GetRoadTileType(tile) == ROAD_TILE_DEPOT) {
+	if (IsRoadDepot(tile)) {
 		if (GetTileOwner(tile) == old_player) {
 			if (new_player == PLAYER_SPECTATOR) {
 				DoCommand(tile, 0, 0, DC_EXEC | DC_BANKRUPT, CMD_LANDSCAPE_CLEAR);
@@ -1415,7 +1415,7 @@
 
 	for (RoadType rt = ROADTYPE_ROAD; rt < ROADTYPE_END; rt++) {
 		/* ROADTYPE_ROAD denotes the tile owner, so update it too */
-		if (rt != ROADTYPE_ROAD && !HasBit(GetRoadTypes(tile), rt)) continue;
+		if (rt != ROADTYPE_ROAD && !HasTileRoadType(tile, rt)) continue;
 
 		if (GetRoadOwner(tile, rt) == old_player) {
 			SetRoadOwner(tile, rt, new_player == PLAYER_SPECTATOR ? OWNER_NONE : new_player);

--- a/src/road_gui.cpp	Thu Feb 14 15:13:36 2008 +0000
+++ b/src/road_gui.cpp	Thu Feb 14 15:59:16 2008 +0000
@@ -177,7 +177,7 @@
 {
 	tile += TileOffsByDiagDir(direction);
 	// if there is a roadpiece just outside of the station entrance, build a connecting route
-	if (IsTileType(tile, MP_ROAD) && GetRoadTileType(tile) == ROAD_TILE_NORMAL) {
+	if (IsNormalRoadTile(tile)) {
 		if (GetRoadBits(tile, _cur_roadtype) != ROAD_NONE) {
 			DoCommandP(tile, _cur_roadtype << 4 | DiagDirToRoadBits(ReverseDiagDir(direction)), 0, NULL, CMD_BUILD_ROAD);
 		}

--- a/src/road_map.cpp	Thu Feb 14 15:13:36 2008 +0000
+++ b/src/road_map.cpp	Thu Feb 14 15:59:16 2008 +0000
@@ -16,7 +16,7 @@
 
 RoadBits GetAnyRoadBits(TileIndex tile, RoadType rt)
 {
-	if (!HasBit(GetRoadTypes(tile), rt)) return ROAD_NONE;
+	if (!HasTileRoadType(tile, rt)) return ROAD_NONE;
 
 	switch (GetTileType(tile)) {
 		case MP_ROAD:
@@ -46,7 +46,7 @@
 	uint32 r;
 
 	/* Don't allow local authorities to build roads through road depots or road stops. */
-	if ((IsTileType(tile, MP_ROAD) && IsTileDepotType(tile, TRANSPORT_ROAD)) || (IsTileType(tile, MP_STATION) && !IsDriveThroughStopTile(tile)) || !HasBit(GetRoadTypes(tile), rt)) {
+	if (IsRoadDepotTile(tile) || (IsTileType(tile, MP_STATION) && !IsDriveThroughStopTile(tile)) || !HasTileRoadType(tile, rt)) {
 		return TRACK_BIT_NONE;
 	}
 

--- a/src/road_map.h	Thu Feb 14 15:13:36 2008 +0000
+++ b/src/road_map.h	Thu Feb 14 15:59:16 2008 +0000
@@ -24,6 +24,16 @@
 	return (RoadTileType)GB(_m[t].m5, 6, 2);
 }
 
+static inline bool IsNormalRoad(TileIndex t)
+{
+	return GetRoadTileType(t) == ROAD_TILE_NORMAL;
+}
+
+static inline bool IsNormalRoadTile(TileIndex t)
+{
+	return IsTileType(t, MP_ROAD) && IsNormalRoad(t);
+}
+
 static inline bool IsLevelCrossing(TileIndex t)
 {
 	return GetRoadTileType(t) == ROAD_TILE_CROSSING;
@@ -34,9 +44,19 @@
 	return IsTileType(t, MP_ROAD) && IsLevelCrossing(t);
 }
 
+static inline bool IsRoadDepot(TileIndex t)
+{
+	return GetRoadTileType(t) == ROAD_TILE_DEPOT;
+}
+
+static inline bool IsRoadDepotTile(TileIndex t)
+{
+	return IsTileType(t, MP_ROAD) && IsRoadDepot(t);
+}
+
 static inline RoadBits GetRoadBits(TileIndex t, RoadType rt)
 {
-	assert(GetRoadTileType(t) == ROAD_TILE_NORMAL);
+	assert(IsNormalRoad(t));
 	switch (rt) {
 		default: NOT_REACHED();
 		case ROADTYPE_ROAD: return (RoadBits)GB(_m[t].m4, 0, 4);
@@ -52,7 +72,7 @@
 
 static inline void SetRoadBits(TileIndex t, RoadBits r, RoadType rt)
 {
-	assert(GetRoadTileType(t) == ROAD_TILE_NORMAL); // XXX incomplete
+	assert(IsNormalRoad(t)); // XXX incomplete
 	switch (rt) {
 		default: NOT_REACHED();
 		case ROADTYPE_ROAD: SB(_m[t].m4, 0, 4, r); break;
@@ -80,6 +100,11 @@
 	}
 }
 
+static inline bool HasTileRoadType(TileIndex t, RoadType rt)
+{
+	return HasBit(GetRoadTypes(t), rt);
+}
+
 static inline Owner GetRoadOwner(TileIndex t, RoadType rt)
 {
 	if (!IsTileType(t, MP_ROAD)) return GetTileOwner(t);
@@ -159,7 +184,7 @@
  */
 static inline DisallowedRoadDirections GetDisallowedRoadDirections(TileIndex t)
 {
-	assert(GetRoadTileType(t) == ROAD_TILE_NORMAL);
+	assert(IsNormalRoad(t));
 	return (DisallowedRoadDirections)GB(_m[t].m5, 4, 2);
 }
 
@@ -170,14 +195,14 @@
  */
 static inline void SetDisallowedRoadDirections(TileIndex t, DisallowedRoadDirections drd)
 {
-	assert(GetRoadTileType(t) == ROAD_TILE_NORMAL);
+	assert(IsNormalRoad(t));
 	assert(drd < DRD_END);
 	SB(_m[t].m5, 4, 2, drd);
 }
 
 static inline Axis GetCrossingRoadAxis(TileIndex t)
 {
-	assert(GetRoadTileType(t) == ROAD_TILE_CROSSING);
+	assert(IsLevelCrossing(t));
 	return (Axis)GB(_m[t].m4, 6, 1);
 }
 
@@ -193,13 +218,13 @@
 
 static inline bool IsCrossingBarred(TileIndex t)
 {
-	assert(GetRoadTileType(t) == ROAD_TILE_CROSSING);
+	assert(IsLevelCrossing(t));
 	return HasBit(_m[t].m4, 5);
 }
 
 static inline void SetCrossingBarred(TileIndex t, bool barred)
 {
-	assert(GetRoadTileType(t) == ROAD_TILE_CROSSING);
+	assert(IsLevelCrossing(t));
 	SB(_m[t].m4, 5, 1, barred);
 }
 
@@ -280,7 +305,7 @@
 
 static inline DiagDirection GetRoadDepotDirection(TileIndex t)
 {
-	assert(GetRoadTileType(t) == ROAD_TILE_DEPOT);
+	assert(IsRoadDepot(t));
 	return (DiagDirection)GB(_m[t].m5, 0, 2);
 }
 

--- a/src/roadveh_cmd.cpp	Thu Feb 14 15:13:36 2008 +0000
+++ b/src/roadveh_cmd.cpp	Thu Feb 14 15:59:16 2008 +0000
@@ -182,7 +182,7 @@
 	if (!IsTileDepotType(tile, TRANSPORT_ROAD)) return CMD_ERROR;
 	if (!IsTileOwner(tile, _current_player)) return CMD_ERROR;
 
-	if (HasBit(GetRoadTypes(tile), ROADTYPE_TRAM) != HasBit(EngInfo(p1)->misc_flags, EF_ROAD_TRAM)) return_cmd_error(STR_DEPOT_WRONG_DEPOT_TYPE);
+	if (HasTileRoadType(tile, ROADTYPE_TRAM) != HasBit(EngInfo(p1)->misc_flags, EF_ROAD_TRAM)) return_cmd_error(STR_DEPOT_WRONG_DEPOT_TYPE);
 
 	uint num_vehicles = 1 + CountArticulatedParts(p1, false);
 
@@ -404,8 +404,7 @@
 
 	tile += TileOffsByDiagDir(_road_pf_directions[trackdir]);
 
-	if (IsTileType(tile, MP_ROAD) &&
-			GetRoadTileType(tile) == ROAD_TILE_DEPOT &&
+	if (IsRoadDepotTile(tile) &&
 			IsTileOwner(tile, rfdd->owner) &&
 			length < rfdd->best_length) {
 		rfdd->best_length = length;
@@ -550,7 +549,7 @@
 		return CMD_ERROR;
 	}
 
-	if (IsTileType(v->tile, MP_ROAD) && GetRoadTileType(v->tile) == ROAD_TILE_NORMAL && GetDisallowedRoadDirections(v->tile) != DRD_NONE) return CMD_ERROR;
+	if (IsNormalRoadTile(v->tile) && GetDisallowedRoadDirections(v->tile) != DRD_NONE) return CMD_ERROR;
 
 	if (IsTileType(v->tile, MP_TUNNELBRIDGE) && DirToDiagDir(v->direction) == GetTunnelBridgeDirection(v->tile)) return CMD_ERROR;
 
@@ -1159,7 +1158,7 @@
 	TrackdirBits trackdirs = (TrackdirBits)GB(r,  0, 16);
 
 	if (IsTileType(tile, MP_ROAD)) {
-		if (GetRoadTileType(tile) == ROAD_TILE_DEPOT && (!IsTileOwner(tile, v->owner) || GetRoadDepotDirection(tile) == enterdir || (GetRoadTypes(tile) & v->u.road.compatible_roadtypes) == 0)) {
+		if (IsRoadDepot(tile) && (!IsTileOwner(tile, v->owner) || GetRoadDepotDirection(tile) == enterdir || (GetRoadTypes(tile) & v->u.road.compatible_roadtypes) == 0)) {
 			/* Road depot owned by another player or with the wrong orientation */
 			trackdirs = TRACKDIR_BIT_NONE;
 		}
@@ -1251,7 +1250,7 @@
 			DiagDirection dir;
 
 			if (IsTileType(desttile, MP_ROAD)) {
-				if (GetRoadTileType(desttile) == ROAD_TILE_DEPOT) {
+				if (IsRoadDepot(desttile)) {
 					dir = GetRoadDepotDirection(desttile);
 					goto do_it;
 				}
@@ -1413,7 +1412,7 @@
 
 		if (IsTileType(tile, MP_TUNNELBRIDGE)) {
 			diag_dir = GetTunnelBridgeDirection(tile);
-		} else if (IsTileType(tile, MP_ROAD) && GetRoadTileType(tile) == ROAD_TILE_DEPOT) {
+		} else if (IsRoadDepotTile(tile)) {
 			diag_dir = ReverseDiagDir(GetRoadDepotDirection(tile));
 		}
 
@@ -1582,8 +1581,7 @@
 					case TRACKDIR_RVREV_NW: needed = ROAD_SE; break;
 				}
 				if ((v->Previous() != NULL && v->Previous()->tile == tile) ||
-						(IsRoadVehFront(v) && IsTileType(tile, MP_ROAD) &&
-							GetRoadTileType(tile) == ROAD_TILE_NORMAL && !HasRoadWorks(tile) &&
+						(IsRoadVehFront(v) && IsNormalRoadTile(tile) && !HasRoadWorks(tile) &&
 							(needed & GetRoadBits(tile, ROADTYPE_TRAM)) != ROAD_NONE)) {
 					/*
 					 * Taking the 'big' corner for trams only happens when:
@@ -1614,7 +1612,7 @@
 					v->cur_speed = 0;
 					return false;
 				}
-			} else if (IsTileType(v->tile, MP_ROAD) && GetRoadTileType(v->tile) == ROAD_TILE_NORMAL && GetDisallowedRoadDirections(v->tile) != DRD_NONE) {
+			} else if (IsNormalRoadTile(v->tile) && GetDisallowedRoadDirections(v->tile) != DRD_NONE) {
 				v->cur_speed = 0;
 				return false;
 			} else {
@@ -1757,9 +1755,7 @@
 	/* This vehicle is not in a wormhole and it hasn't entered a new tile. If
 	 * it's on a depot tile, check if it's time to activate the next vehicle in
 	 * the chain yet. */
-	if (v->Next() != NULL &&
-			IsTileType(v->tile, MP_ROAD) && GetRoadTileType(v->tile) == ROAD_TILE_DEPOT) {
-
+	if (v->Next() != NULL && IsRoadDepotTile(v->tile)) {
 		if (v->u.road.frame == v->u.road.cached_veh_length + RVC_DEPOT_START_FRAME) {
 			RoadVehLeaveDepot(v->Next(), false);
 		}

--- a/src/station_cmd.cpp	Thu Feb 14 15:13:36 2008 +0000
+++ b/src/station_cmd.cpp	Thu Feb 14 15:59:16 2008 +0000
@@ -1333,7 +1333,7 @@
 {
 	bool type = HasBit(p2, 0);
 	bool is_drive_through = HasBit(p2, 1);
-	bool build_over_road  = is_drive_through && IsTileType(tile, MP_ROAD) && GetRoadTileType(tile) == ROAD_TILE_NORMAL;
+	bool build_over_road  = is_drive_through && IsNormalRoadTile(tile);
 	bool town_owned_road  = build_over_road && IsTileOwner(tile, OWNER_TOWN);
 	RoadTypes rts = (RoadTypes)GB(p2, 2, 3);
 
@@ -1356,7 +1356,6 @@
 	/* Not allowed to build over this road */
 	if (build_over_road) {
 		if (IsTileOwner(tile, OWNER_TOWN) && !_patches.road_stop_on_town_road) return_cmd_error(STR_DRIVE_THROUGH_ERROR_ON_TOWN_ROAD);
-		if (GetRoadTileType(tile) != ROAD_TILE_NORMAL) return CMD_ERROR;
 
 		RoadTypes cur_rts = GetRoadTypes(tile);
 
@@ -2946,8 +2945,8 @@
 		switch (GetStationType(tile)) {
 			case STATION_RAIL:    return_cmd_error(STR_300B_MUST_DEMOLISH_RAILROAD);
 			case STATION_AIRPORT: return_cmd_error(STR_300E_MUST_DEMOLISH_AIRPORT_FIRST);
-			case STATION_TRUCK:   return_cmd_error(HasBit(GetRoadTypes(tile), ROADTYPE_TRAM) ? STR_MUST_DEMOLISH_CARGO_TRAM_STATION : STR_3047_MUST_DEMOLISH_TRUCK_STATION);
-			case STATION_BUS:     return_cmd_error(HasBit(GetRoadTypes(tile), ROADTYPE_TRAM) ? STR_MUST_DEMOLISH_PASSENGER_TRAM_STATION : STR_3046_MUST_DEMOLISH_BUS_STATION);
+			case STATION_TRUCK:   return_cmd_error(HasTileRoadType(tile, ROADTYPE_TRAM) ? STR_MUST_DEMOLISH_CARGO_TRAM_STATION : STR_3047_MUST_DEMOLISH_TRUCK_STATION);
+			case STATION_BUS:     return_cmd_error(HasTileRoadType(tile, ROADTYPE_TRAM) ? STR_MUST_DEMOLISH_PASSENGER_TRAM_STATION : STR_3046_MUST_DEMOLISH_BUS_STATION);
 			case STATION_BUOY:    return_cmd_error(STR_306A_BUOY_IN_THE_WAY);
 			case STATION_DOCK:    return_cmd_error(STR_304D_MUST_DEMOLISH_DOCK_FIRST);
 			case STATION_OILRIG:

--- a/src/tunnelbridge_cmd.cpp	Thu Feb 14 15:13:36 2008 +0000
+++ b/src/tunnelbridge_cmd.cpp	Thu Feb 14 15:59:16 2008 +0000
@@ -387,7 +387,7 @@
 				break;
 
 			case MP_ROAD:
-				if (GetRoadTileType(tile) == ROAD_TILE_DEPOT) goto not_valid_below;
+				if (IsRoadDepot(tile)) goto not_valid_below;
 				break;
 
 			case MP_TUNNELBRIDGE:

--- a/src/yapf/follow_track.hpp	Thu Feb 14 15:13:36 2008 +0000
+++ b/src/yapf/follow_track.hpp	Thu Feb 14 15:59:16 2008 +0000
@@ -44,7 +44,7 @@
 	/** Tests if a tile is a road tile with a single tramtrack (tram can reverse) */
 	FORCEINLINE DiagDirection GetSingleTramBit(TileIndex tile)
 	{
-		if (IsTram() && IsTileType(tile, MP_ROAD) && GetRoadTileType(tile) == ROAD_TILE_NORMAL) {
+		if (IsTram() && IsNormalRoadTile(tile)) {
 			RoadBits rb = GetRoadBits(tile, ROADTYPE_TRAM);
 			switch (rb) {
 				case ROAD_NW: return DIAGDIR_NW;