--- a/src/engine.cpp	Wed Jun 13 11:45:14 2007 +0000
+++ b/src/engine.cpp	Wed Jun 13 12:05:56 2007 +0000
@@ -178,14 +178,16 @@
 static void AcceptEnginePreview(EngineID eid, PlayerID player)
 {
 	Engine *e = GetEngine(eid);
+	Player *p = GetPlayer(player);
 
 	SETBIT(e->player_avail, player);
 	if (e->type == VEH_TRAIN) {
 		const RailVehicleInfo *rvi = RailVehInfo(eid);
-		Player *p = GetPlayer(player);
 
 		assert(rvi->railtype < RAILTYPE_END);
 		SETBIT(p->avail_railtypes, rvi->railtype);
+	} else if (e->type == VEH_ROAD) {
+		SETBIT(p->avail_roadtypes, HASBIT(EngInfo(eid)->misc_flags, EF_ROAD_TRAM) ? ROADTYPE_TRAM : ROADTYPE_ROAD);
 	}
 
 	e->preview_player = INVALID_PLAYER;
@@ -330,6 +332,12 @@
 			if (p->is_active) SETBIT(p->avail_railtypes, railtype);
 		}
 	}
+	if ((index - NUM_TRAIN_ENGINES) < NUM_ROAD_ENGINES) {
+		/* maybe make another road type available */
+		FOR_ALL_PLAYERS(p) {
+			if (p->is_active) SETBIT(p->avail_roadtypes, HASBIT(EngInfo(index)->misc_flags, EF_ROAD_TRAM) ? ROADTYPE_TRAM : ROADTYPE_ROAD);
+		}
+	}
 	AddNewsItem(index, NEWS_FLAGS(NM_CALLBACK, 0, NT_NEW_VEHICLES, DNC_VEHICLEAVAIL), 0, 0);
 }