public Vector<Road> getRoads() {
		Vector<Vector> v;
		Vector <Road> roads = new Vector<Road>();
		try {
			v = parseQuery(executeQuery(qb.getRoads()), null);
			Iterator<Vector> i = v.iterator();
			while(i.hasNext()) {
				Vector fields = i.next();
				int id = Integer.parseInt(fields.elementAt(0).toString());
				Vector<Point> coors = getCoors("R" + id);
				roads.add(new Road(coors));
			}
		} catch(Exception e) {
			System.out.println(e);
		}
		return roads;
	}